Free calculators

Free calculators for freelancers.

No account, nothing uploaded, built on the real 2026 Dutch rules with every figure checked against belastingdienst.nl.

What do you need to charge?

Your day rate or a single project fee, worked out backwards from what you want to keep.

Split a payment into btw, a tax reserve, business costs and what you can genuinely pay yourself.

The flat 30% rule misses by up to €16.720 on real numbers. See the cases, the sources and every rate we use.