Browser-based
Mortgage, credit card, personal loan, compound interest, car finance and self-employed tax run in your browser. Open a tab and start — no desktop app.
Free online tools
Free tools in your browser
Finanseal — mortgage, credit card, personal loan, compound interest, car finance and self-employed tax. Browser-based, no install, instant results.
Pick a tool and get started
Every tool runs in your browser. No install — save to history only if you want a snapshot.
Mortgage
Home
Estimate a UK repayment or interest-only mortgage in pounds, including overpayments, the balance when a fixed deal ends, and stamp duty.
Credit Card
Debt
See how long a UK card balance takes to clear at your APR, then compare a 0% transfer including fee and promotional months.
Personal Loan
Borrow
Calculate monthly payments and total interest on a UK personal loan, including an arrangement fee, then compare a second APR.
Compound Interest
Invest
Project ISA or SIPP-style growth from a starting pot, monthly additions, and rate, including years to a FIRE target.
Car Finance
Vehicles
Compare UK hire purchase, PCP, and personal contract hire total cost, including deposit, balloon, and part-exchange.
Self-Employed Tax
Tax
Estimate 2026/27 Income Tax and Class 4 National Insurance on trading profits, with Scotland vs rUK and a simplified limited-company comparison.
Built for the browser
Get an answer in seconds without installing software or creating an account first.
Instant results
No queue, no email link, no waiting on a server. Open a tool and see the answer immediately.
No install
Use mortgage, credit card, personal loan, compound interest, car finance and self-employed tax from any modern browser. Nothing to download, update, or license.
Optional history
Save a snapshot for seven days when you need to come back. Sign in to keep history across sessions.
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Create a free account to claim guest saves and keep your tool history across devices.