One financial system. Far more than accounting.
Traditional accounting software starts after activity has happened. RegNexus Books starts with numbers you can trust — then helps you test the future, control what happens and prove what is true.
Deterministic ledger
Invoicing, bills, banking & reconciliation, VAT (MTD), reporting and fixed assets — financial truth calculated from governed rules, not generated.
Ask your books
Direct financial-state queries grounded in the ledger. Answers, not report navigation — with AI explanation that never authors the figures.
Close through the month
Accruals, prepayments, reversals, flux analysis and close tasks — close continuously instead of discovering problems at month-end.
Recognised by rule
Contracts, milestones, obligations and deferred revenue recognised deterministically — not by spreadsheet.
Group control
Entities, intercompany, FX, translation, eliminations and consolidated reporting that reconciles.
Test the decision
A financial digital twin: forecast, model counterfactuals and learn from variance — test tomorrow before you commit.
Prove what is true
Turn a transaction into evidence, authority, a hash, a credential and verification. Prove more, reveal less.
Connect to the world
Continuum, Accord, Credence and Constellation — connect decisions to authority, agreements, obligations and outcomes.
Who can see, decide, act
Four-eyes approval, materiality controls, immutable audit history, API scopes and webhook signing.
Connect without surrendering control
HMRC, Companies House, Open Banking, Stripe, TrueLayer and SumUp — production-supported providers, labelled honestly.
Advanced capability without an ERP project.
Deterministic where financial truth matters — AI explains, it does not decide the numbers.