Pricing
Start free with 100 calculations a month. Every plan has every endpoint and every tax year.
Free
£0 no card
- Included
- 100 calculations a month
- Then
- Stops until next month (402, with an upgrade link)
- Rate limit
- 5 a second
Pro
£14 a month
- Included
- 5,000 calculations a month
- Then
- £4 per 1,000 more
- Rate limit
- 20 a second
Scale
£49 a month
- Included
- 50,000 calculations a month
- Then
- £2 per 1,000 more
- Rate limit
- 50 a second
Enterprise
Custom invoiced
- Included
- Your volume
- Then
- Agreed with you
- Rate limit
- Agreed, with an SLA
Questions
What counts as a calculation?
One successful call to any endpoint that needs a key: a take-home, an employer cost, a payroll period, a statutory payment and so on. Calls refused for bad input are not counted, and reference data (rates, tax years, tax codes) is free.
Do plans limit which endpoints I can use?
No. Every plan has every endpoint and every tax year; plans differ only in volume and rate limit.
What happens when the free plan’s 100 are used up?
Calls return 402 with a link to upgrade until the next month. Paid plans never stop: calculations past the plan’s allowance are billed as extra, in arrears.
Is there a sandbox?
The free plan is the sandbox: a calculation costs nothing to serve and touches no one’s data, so every key gets real answers from its first call.
Get an API key
Free to start, with every endpoint.