For buy-to-let & BRRRR investors · 1–20 units
Deal analysis you can show your lender.
Underwrite rental deals in minutes, not spreadsheets.
Every figure calculated the same way every time, with each input and assumption on record — so when a lender or partner asks how you got there, you hand them the page.
Concept preview · sample dealAudit pack
14 Elm Road, LeedsBuy-to-let · interest-only · 6 Oct 2026
REPRODUCIBLE
Inputs
Purchase price£145,000.00
Rent / month£1,150.00
Upfront costs£21,850.00
Assumptions
Deposit25.00%
Rate (IO)5.20%
Running costs15.00% of rent
Results
Monthly interest£108,750.00 × 5.20% ÷ 12 = £471.25
Monthly cash flow£506.25
Gross yield9.52%
Rounded half-up to the penny at each steprecord 7f3a·91c2
Reproducible
Same inputs, same answer.
Deterministic calculations with exact money maths — no broken formulas, no drift between versions.
On record
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