diff --git a/src/bin.ts b/src/bin.ts
index 5401d44..2a78b45 100644
--- a/src/bin.ts
+++ b/src/bin.ts
@@ -37,6 +37,11 @@ import type { Context, ImportSheetConfig } from "./types";
       describe: "Prefix to use for keys.",
       type: "string",
     })
+    .option("filenamePrefix", {
+      default: "",
+      describe: "Prefix to use for filenames.",
+      type: "string",
+    })
     .option("envFile", {
       alias: "e",
       default: ".env",
diff --git a/src/importSheet.spec.ts b/src/importSheet.spec.ts
index 7c94ab8..67e5732 100644
--- a/src/importSheet.spec.ts
+++ b/src/importSheet.spec.ts
@@ -88,4 +88,19 @@ describe("importSheet", () => {
       stream.emit("end");
     }).rejects.toBeInstanceOf(Error);
   });
+
+  it("prepends filename with a prefix if one is passed", async () => {
+    expect.assertions(1);
+    getMock.mockResolvedValue("key,nl_NL,en_GB\nmy_translation,woord,word\n");
+
+    await importSheet(createMockContext({ filenamePrefix: "prefix_" }));
+
+    expect(writeFileSpy).toHaveBeenNthCalledWith(
+      1,
+      "/dist/prefix_nl_NL.json",
+      JSON.stringify({ my_translation: "woord", lang: "nl_NL" }, null, 2) +
+        "\n",
+      { encoding: "utf-8" },
+    );
+  });
 });
diff --git a/src/importSheet.ts b/src/importSheet.ts
index cd25145..3c2aab2 100644
--- a/src/importSheet.ts
+++ b/src/importSheet.ts
@@ -33,9 +33,13 @@ export async function importSheet(context: Context): Promise<void> {
 
   await Promise.all(
     columns.map((record) => {
-      const { key, records } = formatRecords(record, keys, context);
+      const { key: filename, records } = formatRecords(record, keys, context);
 
-      return writeJsonFile(key, records, context);
+      return writeJsonFile(
+        (config.filenamePrefix ?? "") + filename,
+        records,
+        context,
+      );
     }),
   );
 
diff --git a/src/types.ts b/src/types.ts
index beaf702..7814814 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -21,6 +21,7 @@ export interface ImportSheetConfig {
   columnKey?: string;
   outputDir?: string;
   prefix?: string;
+  filenamePrefix?: string;
   sheetId?: number | string;
 }
 
diff --git a/src/utils/createConfig.ts b/src/utils/createConfig.ts
index e00b441..fba180d 100644
--- a/src/utils/createConfig.ts
+++ b/src/utils/createConfig.ts
@@ -11,6 +11,7 @@ export function createConfig(
     sheetId: 0,
     outputDir: "translations",
     prefix: "",
+    filenamePrefix: "",
     ...userConfig,
   };
 }
diff --git a/src/utils/writeJsonFile.ts b/src/utils/writeJsonFile.ts
index de6f197..9919b5f 100644
--- a/src/utils/writeJsonFile.ts
+++ b/src/utils/writeJsonFile.ts
@@ -5,11 +5,11 @@ import { VerbosityLevel } from "../types";
 import chalk from "chalk";
 
 export const writeJsonFile = async (
-  key: string,
+  filename: string,
   records: Record<string, string>,
   { config, debug, verbosity }: Context,
 ): Promise<void> => {
-  const filePath = path.resolve(config.outputDir, `${key}.json`);
+  const filePath = path.resolve(config.outputDir, `${filename}.json`);
   const jsonData = JSON.stringify(records, null, 2);
   const folder = filePath.replace(path.basename(filePath), "");
 
@@ -19,7 +19,7 @@ export const writeJsonFile = async (
   if (verbosity >= VerbosityLevel.Info) {
     debug(
       chalk.green(
-        `Wrote file for key ${chalk.cyan(key)} to ${chalk.yellow(
+        `Wrote file for key ${chalk.cyan(filename)} to ${chalk.yellow(
           path.relative(process.cwd(), filePath),
         )}`,
       ),