diff --git a/src/components/BirthdayInputField/BirthdayInputField.example.js b/src/components/BirthdayInputField/BirthdayInputField.example.js
index 13a989cf..c82ff930 100644
--- a/src/components/BirthdayInputField/BirthdayInputField.example.js
+++ b/src/components/BirthdayInputField/BirthdayInputField.example.js
@@ -8,6 +8,8 @@ const formName = 'Styleguide.BirthdayInput.Form';
 
 const FormComponent = () => {
   const required = validators.required('A valid date is required');
+  const minAge = 18;
+  const minAgeRequired = validators.ageAtLeast(`Age should be at least ${minAge}`, minAge);
   return (
     <form>
       <BirthdayInputField
@@ -15,7 +17,7 @@ const FormComponent = () => {
         name="birthday"
         label="Date of birth"
         format={null}
-        validate={required}
+        validate={[required, minAgeRequired]}
       />
     </form>
   );
diff --git a/src/containers/PayoutDetailsForm/PayoutDetailsForm.js b/src/containers/PayoutDetailsForm/PayoutDetailsForm.js
index 5b3da997..1c134b9e 100644
--- a/src/containers/PayoutDetailsForm/PayoutDetailsForm.js
+++ b/src/containers/PayoutDetailsForm/PayoutDetailsForm.js
@@ -17,6 +17,8 @@ import * as validators from '../../util/validators';
 
 import css from './PayoutDetailsForm.css';
 
+const MIN_STRIPE_ACCOUNT_AGE = 18;
+
 const supportedCountries = config.stripe.supportedCountries.map(c => c.code);
 
 export const stripeCountryConfigs = countryCode => {
@@ -78,6 +80,17 @@ const PayoutDetailsFormComponent = props => {
       id: 'PayoutDetailsForm.birthdayRequired',
     })
   );
+  const birthdayMinAge = validators.ageAtLeast(
+    intl.formatMessage(
+      {
+        id: 'PayoutDetailsForm.birthdayMinAge',
+      },
+      {
+        minAge: MIN_STRIPE_ACCOUNT_AGE,
+      }
+    ),
+    MIN_STRIPE_ACCOUNT_AGE
+  );
 
   const countryLabel = intl.formatMessage({ id: 'PayoutDetailsForm.countryLabel' });
   const countryPlaceholder = intl.formatMessage({ id: 'PayoutDetailsForm.countryPlaceholder' });
@@ -218,7 +231,7 @@ const PayoutDetailsFormComponent = props => {
           labelForMonth={birthdayLabelMonth}
           labelForYear={birthdayLabelYear}
           format={null}
-          validate={birthdayRequired}
+          validate={[birthdayRequired, birthdayMinAge]}
         />
       </div>
 
diff --git a/src/translations/en.json b/src/translations/en.json
index 3bd4f990..5359f8ec 100644
--- a/src/translations/en.json
+++ b/src/translations/en.json
@@ -317,6 +317,7 @@
   "PayoutDetailsForm.birthdayLabel": "Birth date",
   "PayoutDetailsForm.birthdayLabelMonth": "Month",
   "PayoutDetailsForm.birthdayLabelYear": "Year",
+  "PayoutDetailsForm.birthdayMinAge": "You should be at least {minAge} years old.",
   "PayoutDetailsForm.birthdayMonthPlaceholder": "mm",
   "PayoutDetailsForm.birthdayRequired": "Birthday is required and must be a valid date.",
   "PayoutDetailsForm.birthdayYearPlaceholder": "yyyy",
diff --git a/src/util/validators.js b/src/util/validators.js
index 0e916365..9fedaaa9 100644
--- a/src/util/validators.js
+++ b/src/util/validators.js
@@ -1,3 +1,4 @@
+import moment from 'moment';
 import { types } from 'sharetribe-sdk';
 
 const { LatLng } = types;
@@ -68,3 +69,10 @@ export const emailFormatValid = message =>
   value => {
     return value && EMAIL_RE.test(value) ? VALID : message;
   };
+
+export const ageAtLeast = (message, minYears) =>
+  value => {
+    const now = moment();
+    const ageInYears = now.diff(moment(value), 'years', true);
+    return value && value instanceof Date && ageInYears >= minYears ? VALID : message;
+  };