The whole underwrite, on one machine.
No tabs of broken spreadsheet formulas. BuyBox computes every number a buy-and-hold or BRRRR investor needs (the industry-standard way), and scores it against the criteria you set.
Survival
Will it keep the lights on every month?
Equity
How much cushion is built in on day one?
Returns
What does the money actually earn?
Every figure ships with a threshold chip, strong, workable, or outside your band, set by your buy box.
Refinance math that matches the closing statement.
Model the bridge financing, the rehab hold and the DSCR cash-out refinance end to end. BuyBox computes the net proceeds you actually pocket (not loan-minus-basis hand-waving), so you know precisely how much capital comes back out, including the fully cashed-out case, where cash-on-cash stops applying because nothing is left in the deal.
See the next 30 years before you sign.
Project rent growth, appreciation, expense creep and loan paydown year by year. Run a hypothetical sale at any exit and get total return, AAR and CAGR, plus a full month-by-month amortization schedule.
Saved to your account, on every browser
Every deal is saved to your account: encrypted in transit and at rest, isolated to you. Sign in from any browser and your portfolio is already there. No spreadsheets to email yourself.
Instant, on-device analysis
The calc engine runs in your browser, not on our servers, so analysis is instant and keeps responding even if our services are briefly unavailable. You’ll need to be signed in, and saving needs a connection.
Chrome capture extension
Send a listing from a supported listing site to a pre-filled Quick Analysis, no retyping. Beds, baths, sqft, price and photos extracted automatically.
Rentometer rent comps
Connect your Rentometer API key to auto-estimate market rent on address entry, or type your own number any time.
Portfolio tracking
Close a deal and it moves to your portfolio (rehabbing, stabilized, listed or sold) with actual-vs-projected performance and a final IRR at disposition.
Source-tagged inputs
Every value is tagged EST, ASM or ACT so you always know what's a guess and what's real.
What a finished analysis looks like.
These are screens from BuyBox's results page for a real listing, run with the default assumptions. The verdict is whatever the engine reached: this deal came out High Risk, with four metrics flagged. The trial runs the same analysis on your own listing.
Sample deal. Real listing, run as a sample. Not investment advice.
Run your next listing through it.
Start free in your browser, no download, no card.