diff --git a/.changeset/smart-ghosts-complain.md b/.changeset/smart-ghosts-complain.md
new file mode 100644
index 000000000..b3a224007
--- /dev/null
+++ b/.changeset/smart-ghosts-complain.md
@@ -0,0 +1,5 @@
+---
+'skuba': minor
+---
+
+init: Support `main` default branch
diff --git a/docs/cli/init.md b/docs/cli/init.md
index 13eff82ef..09cfc6e7a 100644
--- a/docs/cli/init.md
+++ b/docs/cli/init.md
@@ -134,10 +134,11 @@ git remote get-url origin
 ```
 
 **skuba** has committed its initial template files and configured a remote `origin` for you.
-You should create the corresponding repository on GitHub and push to it:
+You should create the corresponding repository on GitHub and push to it.
+Replace `main` with your default branch name as appropriate:
 
 ```shell
-git push --set-upstream origin master
+git push --set-upstream origin main
 ```
 
 ### Directory structure
diff --git a/scripts/test-template.sh b/scripts/test-template.sh
index 4ae01a497..9bbc9e26b 100755
--- a/scripts/test-template.sh
+++ b/scripts/test-template.sh
@@ -34,7 +34,8 @@ yarn skuba init << EOF
     "platformName": "arm64",
     "repoName": "${directory}",
     "serviceName": "serviceName",
-    "region": "ap-southeast-2"
+    "region": "ap-southeast-2",
+    "defaultBranch": "main"
   },
   "templateName": "${template}"
 }
diff --git a/src/cli/init/getConfig.ts b/src/cli/init/getConfig.ts
index 1faff6409..af6bc1045 100644
--- a/src/cli/init/getConfig.ts
+++ b/src/cli/init/getConfig.ts
@@ -150,6 +150,7 @@ const baseToTemplateData = async ({
   ownerName,
   platformName,
   repoName,
+  defaultBranch,
 }: BaseFields) => {
   const [orgName, teamName] = ownerName.split('/');
 
@@ -163,6 +164,7 @@ const baseToTemplateData = async ({
     orgName,
     ownerName,
     repoName,
+    defaultBranch,
     // Use standalone username in `teamName` contexts
     teamName: teamName ?? orgName,
 
@@ -176,7 +178,7 @@ const baseToTemplateData = async ({
 };
 
 export const configureFromPrompt = async (): Promise<InitConfig> => {
-  const { ownerName, platformName, repoName } =
+  const { ownerName, platformName, repoName, defaultBranch } =
     await runForm<BaseFields>(BASE_PROMPT_PROPS);
   log.plain(chalk.cyan(repoName), 'by', chalk.cyan(ownerName));
 
@@ -184,6 +186,7 @@ export const configureFromPrompt = async (): Promise<InitConfig> => {
     ownerName,
     platformName,
     repoName,
+    defaultBranch,
   });
 
   const destinationDir = repoName;
diff --git a/src/cli/init/git.ts b/src/cli/init/git.ts
index 585890a7c..a9063cc4a 100644
--- a/src/cli/init/git.ts
+++ b/src/cli/init/git.ts
@@ -10,15 +10,15 @@ import { log } from '../../utils/logging';
 interface GitHubProject {
   orgName: string;
   repoName: string;
+  defaultBranch: string;
 }
 
 export const initialiseRepo = async (
   dir: string,
-  { orgName, repoName }: GitHubProject,
+  { orgName, repoName, defaultBranch }: GitHubProject,
 ) => {
   await git.init({
-    // TODO: support main as an alternative.
-    defaultBranch: 'master',
+    defaultBranch,
     dir,
     fs,
   });
diff --git a/src/cli/init/index.ts b/src/cli/init/index.ts
index 6dd33bcbd..c40d766a2 100644
--- a/src/cli/init/index.ts
+++ b/src/cli/init/index.ts
@@ -116,7 +116,7 @@ export const init = async () => {
     log.ok('yarn add --dev', skubaSlug);
     log.ok('git add --all');
     log.ok('git commit --message', `'Pin ${skubaSlug}'`);
-    log.ok('git push --set-upstream origin master');
+    log.ok(`git push --set-upstream origin ${templateData.defaultBranch}`);
 
     log.newline();
     process.exitCode = 1;
@@ -132,7 +132,7 @@ export const init = async () => {
   log.newline();
   log.plain('Then, push your local changes:');
   log.ok('cd', destinationDir);
-  log.ok('git push --set-upstream origin master');
+  log.ok(`git push --set-upstream origin ${templateData.defaultBranch}`);
 
   log.newline();
 };
diff --git a/src/cli/init/prompts.ts b/src/cli/init/prompts.ts
index 7372d099a..142e99410 100644
--- a/src/cli/init/prompts.ts
+++ b/src/cli/init/prompts.ts
@@ -66,6 +66,13 @@ const BASE_CHOICES = [
     validate: (value: unknown) =>
       isPlatform(value) || `must be ${PLATFORM_OPTIONS}`,
   },
+  {
+    name: 'defaultBranch',
+    message: 'Default Branch',
+    initial: 'master | main',
+    validate: (value: unknown) =>
+      typeof value === 'string' && value.length > 0 ? true : 'required',
+  },
 ] as const;
 
 export const BASE_PROMPT_PROPS = {
diff --git a/src/cli/init/types.ts b/src/cli/init/types.ts
index 1654404fc..d72bce896 100644
--- a/src/cli/init/types.ts
+++ b/src/cli/init/types.ts
@@ -12,6 +12,7 @@ export const initConfigInputSchema = z.object({
       ownerName: z.string(),
       repoName: z.string(),
       platformName: z.union([z.literal('amd64'), z.literal('arm64')]),
+      defaultBranch: z.string(),
     })
     .catchall(z.string()),
   templateName: z.string(),
@@ -28,6 +29,7 @@ const initConfigSchema = initConfigInputSchema
       .object({
         ownerName: z.string(),
         repoName: z.string(),
+        defaultBranch: z.string(),
 
         // Derived from ownerName
         // TODO: use zod to transform `InitConfigInput` -> `InitConfig`?