diff --git a/.changeset/long-eels-guess.md b/.changeset/long-eels-guess.md
new file mode 100644
index 000000000..9dafb58c0
--- /dev/null
+++ b/.changeset/long-eels-guess.md
@@ -0,0 +1,5 @@
+---
+'@lion/input-amount': patch
+---
+
+Reformat input-amount's formattedValue on locale changes, also respond to locale property.
diff --git a/docs/components/inputs/input-amount/features.md b/docs/components/inputs/input-amount/features.md
index 4e6faf784..b337ae9b9 100644
--- a/docs/components/inputs/input-amount/features.md
+++ b/docs/components/inputs/input-amount/features.md
@@ -35,14 +35,16 @@ export const currencySuffix = () => html`
 Locale can be forced for a specific `lion-input-amount`. It will format the amount according to this locale.
 
 ```js preview-story
-export const forceLocale = () => html`
-  <lion-input-amount
-    label="Price"
-    currency="JOD"
-    .formatOptions=${{ locale: 'nl-NL' }}
-    .modelValue=${123456.78}
-  ></lion-input-amount>
-`;
+export const forceLocale = () => {
+  return html`
+    <lion-input-amount
+      label="Price"
+      currency="JOD"
+      .locale="nl-NL"
+      .modelValue=${123456.78}
+    ></lion-input-amount>
+  `;
+};
 ```
 
 > The separators are now flipped due to Dutch locale. On top of that, due to JOD currency, the minimum amount of decimals is 3 by default for this currency.
diff --git a/packages/input-amount/src/LionInputAmount.js b/packages/input-amount/src/LionInputAmount.js
index 746c2e1a4..d09fd3da7 100644
--- a/packages/input-amount/src/LionInputAmount.js
+++ b/packages/input-amount/src/LionInputAmount.js
@@ -26,6 +26,7 @@ export class LionInputAmount extends LocalizeMixin(LionInput) {
        * validators.
        */
       modelValue: Number,
+      locale: { attribute: false },
     };
   }
 
@@ -68,6 +69,8 @@ export class LionInputAmount extends LocalizeMixin(LionInput) {
     this.formatter = formatAmount;
     /** @type {string | undefined} */
     this.currency = undefined;
+    /** @type {string | undefined} */
+    this.locale = undefined;
     this.defaultValidators.push(new IsNumber());
   }
 
@@ -88,6 +91,28 @@ export class LionInputAmount extends LocalizeMixin(LionInput) {
     if (changedProperties.has('currency') && this.currency) {
       this._onCurrencyChanged({ currency: this.currency });
     }
+
+    if (changedProperties.has('locale') && this.locale !== changedProperties.get('locale')) {
+      if (this.locale) {
+        this.formatOptions.locale = this.locale;
+      } else {
+        delete this.formatOptions.locale;
+      }
+      this.__reformat();
+    }
+  }
+
+  /**
+   * @param {string} newLocale
+   * @param {string} oldLocale
+   * @enhance LocalizeMixin
+   */
+  onLocaleChanged(newLocale, oldLocale) {
+    super.onLocaleChanged(newLocale, oldLocale);
+    // If locale property is used, no need to respond to global locale changes
+    if (!this.locale) {
+      this.__reformat();
+    }
   }
 
   /**
@@ -126,4 +151,8 @@ export class LionInputAmount extends LocalizeMixin(LionInput) {
   get __currencyLabel() {
     return this.currency ? formatCurrencyLabel(this.currency, localize.locale) : '';
   }
+
+  __reformat() {
+    this.formattedValue = this._callFormatter();
+  }
 }
diff --git a/packages/input-amount/test/lion-input-amount.test.js b/packages/input-amount/test/lion-input-amount.test.js
index 0fef018a5..14cb160b4 100644
--- a/packages/input-amount/test/lion-input-amount.test.js
+++ b/packages/input-amount/test/lion-input-amount.test.js
@@ -70,6 +70,30 @@ describe('<lion-input-amount>', () => {
     expect(el.formattedValue).to.equal('123,456.78'); // should stay British
   });
 
+  it('reformats the formattedValue when locale property changes', async () => {
+    const el = /** @type {LionInputAmount} */ (
+      await fixture(html`
+        <lion-input-amount .modelValue=${123456.78} .locale="${'en-GB'}"></lion-input-amount>
+      `)
+    );
+    expect(el.formattedValue).to.equal('123,456.78');
+    el.locale = 'nl-NL';
+    await el.updateComplete;
+    expect(el.formattedValue).to.equal('123.456,78');
+  });
+
+  it('reformats the formattedValue with global locale if locale property is unset', async () => {
+    const el = /** @type {LionInputAmount} */ (
+      await fixture(html`
+        <lion-input-amount .modelValue=${123456.78} .locale="${'nl-NL'}"></lion-input-amount>
+      `)
+    );
+    expect(el.formattedValue).to.equal('123.456,78');
+    el.locale = '';
+    await el.updateComplete;
+    expect(el.formattedValue).to.equal('123,456.78');
+  });
+
   it('uses parseAmount for parsing', async () => {
     const el = /** @type {LionInputAmount} */ (
       await fixture(`<lion-input-amount></lion-input-amount>`)
@@ -157,7 +181,44 @@ describe('<lion-input-amount>', () => {
     ).to.equal('my-currency');
   });
 
+  it('reformats on locale changes', async () => {
+    const el = /** @type {LionInputAmount} */ (
+      await fixture(
+        html`<lion-input-amount
+          label="Price"
+          currency="EUR"
+          .modelValue=${123.45}
+        ></lion-input-amount>`,
+      )
+    );
+    expect(el.formattedValue).to.equal('123.45');
+    localize.locale = 'nl-NL';
+    await el.updateComplete;
+    expect(el.formattedValue).to.equal('123,45');
+  });
+
   describe('Accessibility', () => {
+    it('is accessible', async () => {
+      const el = await fixture(
+        `<lion-input-amount><label slot="label">Label</label></lion-input-amount>`,
+      );
+      await expect(el).to.be.accessible();
+    });
+
+    it('is accessible when readonly', async () => {
+      const el = await fixture(
+        `<lion-input-amount readonly .modelValue=${'123'}><label slot="label">Label</label></lion-input-amount>`,
+      );
+      await expect(el).to.be.accessible();
+    });
+
+    it('is accessible when disabled', async () => {
+      const el = await fixture(
+        `<lion-input-amount disabled><label slot="label">Label</label></lion-input-amount>`,
+      );
+      await expect(el).to.be.accessible();
+    });
+
     it('adds currency id to aria-labelledby of input', async () => {
       const el = /** @type {LionInputAmount} */ (
         await fixture(`<lion-input-amount currency="EUR"></lion-input-amount>`)
@@ -182,25 +243,4 @@ describe('<lion-input-amount>', () => {
       // expect(el._currencyDisplayNode?.getAttribute('aria-label')).to.equal('Philippine pisos');
     });
   });
-
-  it('is accessible', async () => {
-    const el = await fixture(
-      `<lion-input-amount><label slot="label">Label</label></lion-input-amount>`,
-    );
-    await expect(el).to.be.accessible();
-  });
-
-  it('is accessible when readonly', async () => {
-    const el = await fixture(
-      `<lion-input-amount readonly .modelValue=${'123'}><label slot="label">Label</label></lion-input-amount>`,
-    );
-    await expect(el).to.be.accessible();
-  });
-
-  it('is accessible when disabled', async () => {
-    const el = await fixture(
-      `<lion-input-amount disabled><label slot="label">Label</label></lion-input-amount>`,
-    );
-    await expect(el).to.be.accessible();
-  });
 });