Billing

VerifyVAT uses usage-based billing.

All customers have access to the same API, with identical behaviour and response formats. What varies across pricing tiers are usage allowances, rate limits, and overage pricing. Those values are defined on the Pricing page.

Default account state

New accounts start without a payment method.

The API is fully usable in this state and all requests count toward the monthly quota. If the included quota is exhausted, requests are blocked and no charges are incurred.

Usage, quotas, and overage

Each billing cycle includes a fixed number of requests.

Once the included quota is exceeded, requests continue normally only if a payment method is on file. Excess requests are billed as overage at the end of the month, including on annual subscriptions.

Each overage request includes the response header CW-Billable-Overage: true. See Response envelope for details.

Accounts without an active plan receive HTTP 429 with code monthly-quota-exceeded when their monthly included allowance is exhausted. Subscribe to a plan or wait for the allowance to reset.

Rate limits

Production requests use usage, burst, and concurrency slots shared across the account’s production API keys and API versions. Usage and burst slots become available again over time. Concurrency slots become available when requests finish.

These limits are separate from the monthly included quota and billable overage. Requests blocked by them return HTTP 429, use no slots, consume no monthly quota, and are not billed.

Plan limits are listed on the Pricing page.

Test requests use the same slot limits as production, with separate availability shared across the account’s test API keys and API versions. Accounts without an active plan use Flex limits for testing. Test requests consume no monthly quota and incur no charges.

See Error handling for details on how to respond to rate limit errors.

Plan changes

The current plan can be changed at any time from the Profile › Billing page.

Upgrades apply immediately. New limits take effect at once and charges are prorated, crediting any unused value from the current tier.

Downgrades apply at the next renewal. Until then, existing limits remain active.

Cancellation

Subscriptions can be cancelled at any time. After cancellation, access continues until the end of the current paid period and no further charges occur.

Refunds are not offered except where required by law.

Taxes and VAT

Providing a business VAT ID is optional.

EU customers who provide a valid VAT number receive reverse-charge invoicing. EU customers without a VAT number are charged VAT based on their location.

VerifyVAT operates in the EU under VAT number EU372082818.

Payments and billing management

Billing is handled by an external partner, including payment methods, invoices, receipts, payment failures, renewal reminders, and subscription changes.

You can manage your subscription, view invoices, and update payment methods from the Profile › Billing page.