The Tax Brief real effective rates for 111+ countries — bi-weekly, free.

Check your email

Your API key is on its way. It should arrive within a minute or two.

1
Find the email from api@countrytaxcalc.com — check your spam folder if it doesn't appear within 5 minutes.
2
Store your key securely. It's shown once in the email. Don't commit it to git or expose it in client-side code.
3
Make your first call. Add X-API-Key: your_key to the request header.
Quick start — cURL
curl -X POST https://api.countrytaxcalc.com/api/v1/calculate \
  -H "X-API-Key: ctc_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{"country": "DE", "income": 80000, "currency": "USD"}'

Key didn't arrive? Email hello@countrytaxcalc.com and we'll sort it manually.