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ParaplanAI

— Try without signing up · Same engine as the authed suite

Exercise the calcs before you give us an email.

HMRC's own TSR calculator still gets the post-2021/22 PSA recalc wrong. Ours doesn't. Run a calc and check.

Every calc below runs the same engine and the same versioned tax-year config that signed-in firms use. Nothing is saved server-side; nothing leaves your browser without you clicking. Sign in only when you want to save a case or download the compliance PDF.