diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29594f4e3bc6..56a3c9f2de4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -62,6 +62,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Rename `--line-height-*` variables to `--leading-*` ([#14925](https://github.com/tailwindlabs/tailwindcss/pull/14925))
 - Revert specificity of `*` variant to match v3 behavior ([#14920](https://github.com/tailwindlabs/tailwindcss/pull/14920))
 - Replace `outline-none` with `outline-hidden`, add new simplified `outline-none` utility ([#14926](https://github.com/tailwindlabs/tailwindcss/pull/14926))
+- Revert adding borders by default to form inputs ([#14929](https://github.com/tailwindlabs/tailwindcss/pull/14929))
 
 ## [4.0.0-alpha.31] - 2024-10-29
 
diff --git a/integrations/upgrade/index.test.ts b/integrations/upgrade/index.test.ts
index 9784f57c98b7..469291390e61 100644
--- a/integrations/upgrade/index.test.ts
+++ b/integrations/upgrade/index.test.ts
@@ -133,22 +133,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       @utility foo {
         color: red;
       }
@@ -240,22 +224,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       .btn {
         @apply tw:rounded-md! tw:px-2 tw:py-1 tw:bg-blue-500 tw:text-white;
       }
@@ -320,22 +288,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       .a {
         @apply flex;
       }
@@ -408,22 +360,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       @layer base {
         html {
           color: #333;
@@ -501,22 +437,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       @utility btn {
         @apply rounded-md px-2 py-1 bg-blue-500 text-white;
       }
@@ -1002,22 +922,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- ./src/utilities.css ---
       @utility no-scrollbar {
         &::-webkit-scrollbar {
@@ -1442,22 +1346,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- ./src/root.2.css ---
       /* Already contains @config */
       @import 'tailwindcss';
@@ -1482,22 +1370,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- ./src/root.3.css ---
       /* Inject missing @config above first @theme */
       @import 'tailwindcss';
@@ -1532,22 +1404,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- ./src/root.4.css ---
       /* Inject missing @config due to nested imports with tailwind imports */
       @import './root.4/base.css';
@@ -1580,22 +1436,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- ./src/root.4/utilities.css ---
       @import 'tailwindcss/utilities' layer(utilities);
 
@@ -1622,22 +1462,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
   },
@@ -1696,22 +1520,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- ./src/styles/components.css ---
       .btn {
         @apply bg-black px-4 py-2 rounded-md text-white font-medium hover:bg-zinc-800;
diff --git a/integrations/upgrade/js-config.test.ts b/integrations/upgrade/js-config.test.ts
index 2681e890f877..6e03c77c62de 100644
--- a/integrations/upgrade/js-config.test.ts
+++ b/integrations/upgrade/js-config.test.ts
@@ -279,22 +279,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- src/test.js ---
       export default {
         'shouldNotMigrate': !border.test + '',
@@ -402,22 +386,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
 
@@ -499,22 +467,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
 
@@ -588,22 +540,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
 
@@ -681,22 +617,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
 
@@ -770,22 +690,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
 
@@ -898,22 +802,6 @@ test(
         }
       }
 
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
-
       --- project-b/src/input.css ---
       @import 'tailwindcss';
 
@@ -938,22 +826,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
   },
@@ -1030,22 +902,6 @@ test(
           border-color: var(--color-gray-200, currentColor);
         }
       }
-
-      /*
-        Form elements have a 1px border by default in Tailwind CSS v4, so we've
-        added these compatibility styles to make sure everything still looks the
-        same as it did with Tailwind CSS v3.
-
-        If we ever want to remove these styles, we need to add \`border-0\` to
-        any form elements that shouldn't have a border.
-      */
-      @layer base {
-        input:where(:not([type='button'], [type='reset'], [type='submit'])),
-        select,
-        textarea {
-          border-width: 0;
-        }
-      }
       "
     `)
   },
@@ -1105,22 +961,6 @@ describe('border compatibility', () => {
             border-color: var(--color-gray-200, currentColor);
           }
         }
-
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
         "
       `)
     },
@@ -1182,22 +1022,6 @@ describe('border compatibility', () => {
             border-color: oklch(0.623 0.214 259.815);
           }
         }
-
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
         "
       `)
     },
@@ -1241,22 +1065,6 @@ describe('border compatibility', () => {
         "
         --- src/input.css ---
         @import 'tailwindcss';
-
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
         "
       `)
     },
@@ -1316,22 +1124,6 @@ describe('border compatibility', () => {
             border-color: var(--color-gray-200, currentColor);
           }
         }
-
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
         "
       `)
     },
@@ -1401,22 +1193,6 @@ describe('border compatibility', () => {
           }
         }
 
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
-
         --- src/input.css ---
         @import './base.css';
         @import './my-base.css';
@@ -1534,22 +1310,6 @@ describe('border compatibility', () => {
           }
         }
 
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
-
         .container {
           width: calc(var(--spacing) * 2);
           width: calc(var(--spacing) * 4.5);
@@ -1663,22 +1423,6 @@ describe('border compatibility', () => {
           }
         }
 
-        /*
-          Form elements have a 1px border by default in Tailwind CSS v4, so we've
-          added these compatibility styles to make sure everything still looks the
-          same as it did with Tailwind CSS v3.
-
-          If we ever want to remove these styles, we need to add \`border-0\` to
-          any form elements that shouldn't have a border.
-        */
-        @layer base {
-          input:where(:not([type='button'], [type='reset'], [type='submit'])),
-          select,
-          textarea {
-            border-width: 0;
-          }
-        }
-
         .container {
           width: var(--spacing-2);
           width: var(--spacing-4_5);
diff --git a/packages/@tailwindcss-postcss/src/__snapshots__/index.test.ts.snap b/packages/@tailwindcss-postcss/src/__snapshots__/index.test.ts.snap
index 5605db731ad4..ba108e6951b6 100644
--- a/packages/@tailwindcss-postcss/src/__snapshots__/index.test.ts.snap
+++ b/packages/@tailwindcss-postcss/src/__snapshots__/index.test.ts.snap
@@ -477,10 +477,6 @@ exports[`\`@import 'tailwindcss'\` is replaced with the generated CSS 1`] = `
     color: inherit;
   }
 
-  input:where(:not([type="button"], [type="reset"], [type="submit"])), select, textarea {
-    border-width: 1px;
-  }
-
   button, input:where([type="button"], [type="reset"], [type="submit"]) {
     appearance: button;
     background: none;
diff --git a/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.test.ts b/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.test.ts
index fae0db2b37de..a4c2bc2aa9ba 100644
--- a/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.test.ts
+++ b/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.test.ts
@@ -48,22 +48,6 @@ it("should add compatibility CSS after the `@import 'tailwindcss'`", async () =>
       ::file-selector-button {
         border-color: var(--color-gray-200, currentColor);
       }
-    }
-
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
     }"
   `)
 })
@@ -96,22 +80,6 @@ it('should add the compatibility CSS after the last `@import`', async () => {
       ::file-selector-button {
         border-color: var(--color-gray-200, currentColor);
       }
-    }
-
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
     }"
   `)
 })
@@ -158,22 +126,6 @@ it('should add the compatibility CSS after the last import, even if a body-less
       ::file-selector-button {
         border-color: var(--color-gray-200, currentColor);
       }
-    }
-
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
     }"
   `)
 })
@@ -222,22 +174,6 @@ it('should add the compatibility CSS before the first `@layer base` (if the "tai
       }
     }
 
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
-    }
-
     @utility bar {
     }
 
@@ -296,22 +232,6 @@ it('should add the compatibility CSS before the first `@layer base` (if the "tai
       }
     }
 
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
-    }
-
     @utility bar {
     }
 
diff --git a/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.ts b/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.ts
index 8f762c4e3218..0fe0b00115b4 100644
--- a/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.ts
+++ b/packages/@tailwindcss-upgrade/src/codemods/migrate-border-compatibility.ts
@@ -30,24 +30,6 @@ const BORDER_COLOR_COMPATIBILITY_CSS = css`
   }
 `
 
-const BORDER_WIDTH_COMPATIBILITY_CSS = css`
-  /*
-    Form elements have a 1px border by default in Tailwind CSS v4, so we've
-    added these compatibility styles to make sure everything still looks the
-    same as it did with Tailwind CSS v3.
-
-    If we ever want to remove these styles, we need to add \`border-0\` to
-    any form elements that shouldn't have a border.
-  */
-  @layer base {
-    input:where(:not([type='button'], [type='reset'], [type='submit'])),
-    select,
-    textarea {
-      border-width: 0;
-    }
-  }
-`
-
 export function migrateBorderCompatibility({
   designSystem,
   userConfig,
@@ -84,7 +66,6 @@ export function migrateBorderCompatibility({
       compatibilityCssString += '\n\n'
     }
 
-    compatibilityCssString += BORDER_WIDTH_COMPATIBILITY_CSS
     compatibilityCssString = `\n@tw-bucket compatibility {\n${compatibilityCssString}\n}\n`
     let compatibilityCss = postcss.parse(compatibilityCssString)
 
diff --git a/packages/@tailwindcss-upgrade/src/index.test.ts b/packages/@tailwindcss-upgrade/src/index.test.ts
index 519508297594..65d74937b42b 100644
--- a/packages/@tailwindcss-upgrade/src/index.test.ts
+++ b/packages/@tailwindcss-upgrade/src/index.test.ts
@@ -114,22 +114,6 @@ it('should migrate a stylesheet', async () => {
       }
     }
 
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
-    }
-
     @utility b {
       z-index: 2;
     }
@@ -199,22 +183,6 @@ it('should migrate a stylesheet (with imports)', async () => {
       ::file-selector-button {
         border-color: var(--color-gray-200, currentColor);
       }
-    }
-
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
     }"
   `)
 })
@@ -259,22 +227,6 @@ it('should migrate a stylesheet (with preceding rules that should be wrapped in
       }
     }
 
-    /*
-      Form elements have a 1px border by default in Tailwind CSS v4, so we've
-      added these compatibility styles to make sure everything still looks the
-      same as it did with Tailwind CSS v3.
-
-      If we ever want to remove these styles, we need to add \`border-0\` to
-      any form elements that shouldn't have a border.
-    */
-    @layer base {
-      input:where(:not([type='button'], [type='reset'], [type='submit'])),
-      select,
-      textarea {
-        border-width: 0;
-      }
-    }
-
     @layer base {
       html {
         color: red;
diff --git a/packages/tailwindcss/preflight.css b/packages/tailwindcss/preflight.css
index cafbaffb100f..b5d747f39187 100644
--- a/packages/tailwindcss/preflight.css
+++ b/packages/tailwindcss/preflight.css
@@ -191,16 +191,6 @@ textarea,
   color: inherit;
 }
 
-/*
-  Reset the default inset border style for form controls to solid.
-*/
-
-input:where(:not([type='button'], [type='reset'], [type='submit'])),
-select,
-textarea {
-  border-width: 1px;
-}
-
 /*
   1. Remove the default background color of buttons by default.
   2. Correct the inability to style the border radius in iOS Safari.