Who builds this
TrueCap is built by one person, a rental investor in Philadelphia. It started as the tool he wanted for his own underwriting — a way to get from an address to a source-labeled first-pass answer in about a minute — and it's still how he runs the deals he considers.
How the numbers are built
Every analysis starts from labeled inputs. Rent can start from HUD's Fair Market Rent benchmark for the area and the mortgage rate from FRED's national 30-year series; property tax is always your local number, because no benchmark stands in for an assessor's bill. Each starting value carries its source label, and you can replace any of them before you rely on the result. The output is a decision, not a score: cash flow after reserves, DSCR, cap rate, cash-on-cash return, Buy Box fit, and the Offer Ceiling — the highest price that still meets your targets — with the best next step and the assumptions most likely to move the answer. The formulas behind all of it are published and versioned on the methodology page, so a partner or lender can check the math instead of taking the label on faith.
Why the math is opinionated
Most rental calculators will produce whatever number you want to see: leave vacancy at zero, skip the CapEx reserve, and everything cash-flows. TrueCap's defaults lean conservative on purpose. Vacancy, maintenance, and CapEx reserves are in the math from the first run, and the verdict says plainly when a deal doesn't work at the asking price. Every assumption is editable — the point isn't to hide the levers, it's to make the first number you see one you could defend to a lender. A deal that only works with optimistic inputs isn't a deal, and finding that out on screen is much cheaper than finding out after closing.
Every formula the analyzer uses is documented, down to the conventions, on the methodology page.
What TrueCap does
Type an address and get a full underwrite in about 60 seconds: monthly cash flow, cap rate, cash-on-cash return, DSCR, 10-year projections, Buy Box fit, and a Deal score. The core analyzer is free with no signup. A paid plan adds unlimited saved deals you can edit, a portfolio dashboard, deal comparison, and lender-facing Pro report exports. Free keeps up to 5 saved deals.
Get in touch
TrueCap is a small operation, which means email actually gets read. Questions about the math, a number that looks off, or something you wish the analyzer did: hello@usetruecap.com.