A full-time CFO costs £150k–250k a year. A fractional one, £3,000–12,000 a month. So most founders run on a spreadsheet — and find out about the VAT threshold, the cash cliff, or the number they can't answer in a board meeting after it's a problem, not before. Solvent runs the day-to-day and tells you what's coming.
Every screen has a built-in AI console that reads your live data — not a generic help doc. Ask "Am I about to hit the VAT threshold?" or "Can I afford to hire?" and it answers from your actual books, and shows you the rule and the number behind the answer. It proposes; you approve. It never moves money or files anything on its own.
From your first invoice to your Series A model — and your accountant's books stay clean.
Sequential numbering, correct VAT by rate, cross-border reverse-charge notes; issued on schedule. Advisory per country — you or your accountant sign the filing.
Categorise spending, attach a contract per supplier, keep proper double-entry books in the background; export to Xero, QuickBooks or Sage.
Import a statement or CSV from your bank, Wise or Stripe (no live account access needed); Solvent matches payments to invoices and costs, and you review the result.
A plain-English dashboard over real books: what you earned, what you owe, and how many months of cash you have left.
Warns you before you cross the sales limit where VAT registration kicks in, estimates corporate tax, and keeps a per-company calendar of what's due, for whom, when.
A multi-year model; swap projections for signed-deal actuals and export to Excel.
Each company follows its own country's rulebook — the right VAT, corporate tax and filing calendar, in the right currency, applied automatically. Adding a new country is a configuration change for us, not a rebuild, so jurisdictions arrive fast. We're live in the four that matter most to globally-incorporated founders:
Estonia, Malta, Ireland, Cyprus, the Netherlands and more on request. Every tax output is advisory — confirm with a local accountant.
One practice workspace. Every client is its own isolated entity, with its own country's rules applied automatically. White-label it as your own service, bill per client, and see what's due across every client in one view. Cleaner client data, less month-end archaeology — and your clients get a clean, exportable set of books instead of a folder of emails.
Solvent isn't a demo. RHND Innovations GmbH — the company behind Solvent — runs its own invoicing, costs and VAT watch on it, across its UK and Austrian entities. Two rules keep it honest: every tax figure is advisory — you or your accountant sign whatever gets filed — and the AI proposes but never acts on your money or filings without you. No lock-in, no revenue share, no price that rises just because you grew.
Browse partner accountants and corporate-service providers who run client books on Solvent — including specialists in UK, US, Austrian and Hungarian entities.
Find a partner →Join the partner directory, get referred founders, and run their books on a white-labelled practice workspace — billed per client, with volume pricing.
Become a partner →Start free for 30 days. Free during Early Access — paid billing starts 1 September 2026.
Prices in GBP; EUR/USD equivalents at checkout.
From £39/mo vs £3,000–12,000/mo for a fractional CFO · prices excl. VAT
VAT, corporation-tax and local-tax outputs are guidance to keep you oriented between accountant conversations — not filing-grade. Each is computed from that jurisdiction's governor ruleset. Always confirm with a qualified local accountant before registering or filing.
Plain answers before you start.
Start free for 30 days. Add your first company and let the AI show you where your numbers stand.
No card for 30 days · From £39/mo · AI proposes, you approve · Every tax figure advisory