diff --git a/.changeset/fix-json-reporter-file-output.md b/.changeset/fix-json-reporter-file-output.md
new file mode 100644
index 000000000000..ded9ba07c70b
--- /dev/null
+++ b/.changeset/fix-json-reporter-file-output.md
@@ -0,0 +1,5 @@
+---
+"@biomejs/biome": patch
+---
+
+Fixed an issue where the JSON reporter didn't write output to a file when `--reporter-file` was specified. The output is now correctly written to the specified file instead of always going to stdout.
diff --git a/crates/biome_cli/src/runner/impls/finalizers/default.rs b/crates/biome_cli/src/runner/impls/finalizers/default.rs
index 6615935c6360..0d889ae9ac3e 100644
--- a/crates/biome_cli/src/runner/impls/finalizers/default.rs
+++ b/crates/biome_cli/src/runner/impls/finalizers/default.rs
@@ -219,8 +219,15 @@ fn print_to_reporter(params: PrintToReporter) -> Result<(), CliDiagnostic> {
                 verbose: cli_options.verbose,
                 working_directory: fs.working_directory().clone(),
             };
+
+            let writer: &mut dyn ReporterWriter = if cli_reporter.is_file_report() {
+                file_reporter_writer
+            } else {
+                &mut console_reporter_writer
+            };
+
             let mut buffer = JsonReporterVisitor::new(summary);
-            reporter.write(&mut console_reporter_writer, &mut buffer)?;
+            reporter.write(writer, &mut buffer)?;
             let root = buffer.to_json();
             if cli_reporter.kind == CliReporterKind::JsonPretty {
                 let formatted =
@@ -229,12 +236,12 @@ fn print_to_reporter(params: PrintToReporter) -> Result<(), CliDiagnostic> {
                         .print()
                         .expect("To print the JSON report");
 
-                console_reporter_writer.log(markup! {
+                writer.log(markup! {
                     {formatted.as_code()}
                 });
             } else {
                 let code = root.to_string();
-                console_reporter_writer.log(markup! {
+                writer.log(markup! {
                     {code}
                 });
             }
diff --git a/crates/biome_cli/tests/snapshots/main_cases_reporter_json/reports_diagnostics_json_check_command_file.snap b/crates/biome_cli/tests/snapshots/main_cases_reporter_json/reports_diagnostics_json_check_command_file.snap
index d2340ef9e38d..96bc13df7b61 100644
--- a/crates/biome_cli/tests/snapshots/main_cases_reporter_json/reports_diagnostics_json_check_command_file.snap
+++ b/crates/biome_cli/tests/snapshots/main_cases_reporter_json/reports_diagnostics_json_check_command_file.snap
@@ -5,55 +5,6 @@ expression: redactor(content)
 ## `file.json`
 
 ```json
-
-```
-
-## `index.ts`
-
-```ts
-import { z} from "z"
-import { z, b , a} from "lodash"
-
-a ==b
-
-debugger
-
-let f;
-		let f;
-```
-
-## `main.ts`
-
-```ts
-import { z} from "z"
-import { z, b , a} from "lodash"
-
-a ==b
-
-debugger
-
-let f;
-		let f;
-```
-
-# Termination Message
-
-```block
-check ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
-
-  × Some errors were emitted while running checks.
-  
-
-
-```
-
-# Emitted Messages
-
-```block
-The --json option is unstable/experimental and its output might change between patches/minor releases.
-```
-
-```block
 {
 	"summary": {
 		"changed": 0,
@@ -362,3 +313,48 @@ The --json option is unstable/experimental and its output might change between p
 }
 
 ```
+
+## `index.ts`
+
+```ts
+import { z} from "z"
+import { z, b , a} from "lodash"
+
+a ==b
+
+debugger
+
+let f;
+		let f;
+```
+
+## `main.ts`
+
+```ts
+import { z} from "z"
+import { z, b , a} from "lodash"
+
+a ==b
+
+debugger
+
+let f;
+		let f;
+```
+
+# Termination Message
+
+```block
+check ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  × Some errors were emitted while running checks.
+  
+
+
+```
+
+# Emitted Messages
+
+```block
+The --json option is unstable/experimental and its output might change between patches/minor releases.
+```