Real estate deal analyzer
See if the deal works before you make the offer.
RE Underwrite Lab turns a price, a rehab budget, and a rent into the numbers that decide a deal: profit, max offer, cash needed, cash flow, and a letter grade. Flips, rentals, BRRRR, short-term rentals, wholesale, and small multifamily, all in one place, in about a minute.
- 29 calculators
- Branded PDF reports
- Every deal saved
- Phone, tablet, or desktop
Card required to start · 48 hours free, then $5.99/mo founding price for the first 100 members (regular $9.99/mo), or $99/yr · Auto-renews until you cancel online
Example · Fix & flip packet
Example flip: $39,731 estimated profit on a 6-month hold. Grade B.
Real report pages. Example numbers, not a real property.
Everything you get
29 calculators. One login.
7 full calculators in Pro that save, compare, and export, plus 22 quick tools you can use free right now, no account needed.
Rentals and BRRRR
8- BRRRRSee how much cash stays stuck after the refi.Pro
- Long-term rentalMonthly cash flow, cap rate, and cash-on-cash in one view.Pro
- Short-term rentalFind out if the short-term rental (Airbnb-style) math works.Pro
- MultifamilyUnderwrite a small building unit by unit.Pro
- Cap rateCompare any property's return in seconds.Free
- Cash-on-cash returnWhat your cash really earns each year.Free
- 1% ruleScreen a rental listing in five seconds.Free
- Keep or sell a rentalHold the rental or cash out, after depreciation recapture.Free
Wholesale and creative deals
5- Wholesale MAOMax offer and your assignment fee, side by side.Pro
- Seller financingStructure owner financing, balloon and all.Free
- Wraparound mortgageSee the spread you keep on a wrap.Free
- Novation offerYour offer, the seller's net, and your profit, compared.Free
- Subject-toTake over the seller's loan and see the cash to get in and the cash flow.Free
Financing
4- Investor mortgageInvestor payments, interest-only, and balloons.Pro
- DSCR loanCheck if the rent qualifies before you call a lender.Free
- Hard money loanTotal cost of a hard money loan, points included.Free
- Assumable mortgage calculatorEquity gap, cash to close, and assumed vs new-loan savings with lender approval.Free
For agents and their clients
2More calculators
6- Hotel underwritingRevPAR to NOI, value, loan size, and IRR for a hotel.Free
- Self-storage underwritingRent roll to NOI, as-is and stabilized value, loan size, and IRR for self-storage.Free
- RV park calculatorMonthly, seasonal, and nightly sites to NOI, value per site, break-even occupancy, loan size, and IRR.Free
- Car wash valuation calculatorRetail washes and unlimited members with churn to SDE, a value range from SDE multiples, land valued apart, loan coverage, and the largest price this cash flow covers.Free
- Laundromat valuation calculatorRevenue and expenses to SDE, a value range from SDE multiples, the asking multiple, loan coverage, and the price the cash flow supports.Free
- Mobile home park calculatorLot rent, park-owned homes, and utility bill-backs to NOI, value per lot, lot rent upside, loan size, and IRR.Free
Every Pro calculator also gets
- Save every dealReopen, tweak, and pick up where you left off.
- Compare side by sideLine up deals and see which one wins.
- Branded PDF reportsFlip, short-term rental, multifamily, and mortgage.
- Any deviceComputer, phone, iPad, or tablet. Install it like an app.
See it in action
Numbers in, answers out
This is the full Pro app with sample numbers: open the desk, type a flip, and read the deal summary. Change a number and every result updates on the spot.
Want the long version? Watch the full fix and flip walkthrough (6 min).
How we compare
Built for the numbers. Priced for every investor.
RE Underwrite Lab next to the deal analyzers investors ask us about most, straight from their own pricing pages. Where they do more, we say so.
| Feature | Our pickRE Underwrite Lab | DealCheck | FlipperForce | Rehab Valuator |
|---|---|---|---|---|
| Monthly price | $9.99/mo ($5.99/mo founding, first 100) or $99/yr | Plus $10/mo · Pro $20/mo | Solo $79/mo ($59/mo billed yearly) | Premium $49/mo · Pro $99/mo |
| Try it first | No-signup demo, then 48 hours free (card required) | Free plan; 14-day free trial of paid plans | 30-day free trial, no card | Free LITE plan (account) |
| Free calculators, no account neededOur edge | 22 quick tools | Free plan (account) | No free plan | Free LITE plan (account) |
| Fix and flip analysis | ||||
| Rental and BRRRR analysis | ||||
| Short-term rental (Airbnb) analysis | Not stated | Not stated | ||
| Multifamily analysis | Multifamily & commercial | Not stated | Not stated | |
| Wholesale / max offer | Max purchase price (Flip Analyzer) | |||
| Subject-to, wrap, seller-finance, and novation | A calculator for each | Creative financing scenarios | Not stated | Not stated |
| Dedicated hotel and self-storage calculatorsOur edge | Not stated | Not stated | Not stated | |
| PDF deal reports | Branded | Custom branding | Investment reports | Funding presentations (paid) |
| Sales comps data | Paid plans | |||
| Line-item rehab estimator | Free quick estimate only | Rehab cost calculator | Rehab budgets (paid) | |
| Project management and accounting | Not stated | Paid plans |
Checked October 31, 2026 on each company's own pricing and feature pages. “Not stated” means we didn't see it there. Prices and features change, so check each site: DealCheck, FlipperForce, Rehab Valuator. Names belong to their owners; no affiliation.
RE Underwrite Lab Pro
Stop guessing. Start underwriting.
Everything you need to run a deal before you make the offer, in one app.
- 29 calculators for flips, rentals, BRRRR, short-term rentals, wholesale, multifamily, creative deals, hotels, self-storage, RV parks, mobile home parks, laundromats, car washes, assumable mortgages, cash-out refinance, and seller net sheets
- Profit, max offer, cash needed, cash flow, and a letter grade in about a minute
- Branded PDF reports you can hand to a lender or partner
- Every deal saved, so you can reopen it, tweak it, and compare
Card required to start · 48 hours free, then $5.99/mo founding price for the first 100 members (regular $9.99/mo), or $99/yr · Auto-renews until you cancel online
Founding price $5.99/mo for the first 100
Pick a plan. Add a card for 48 hours free. Nothing is charged until it ends.
7-day money-back on the first charge
Best value vs. $9.99 monthly
Annual $99/year
$8.25/mo billed yearly, save $20.88 vs $9.99 monthly
$99 a year is $8.25 a month, $20.88 less than 12 months at the standard $9.99. Founding monthly is $5.99, or $71.88 over twelve months, which is less than the annual plan while those spots are open.
Opens secure checkout. Your card isn't charged until the 2 free days end. Cancel before then and you pay nothing. 7-day money-back on your first charge.
Lowest monthly price
Founding member $5.99/month
Founding price for the first 100 subscribers. Stays $5.99 a month for as long as you stay subscribed.
Opens secure checkout. Your card isn't charged until the 2 free days end. Cancel before then and you pay nothing. 7-day money-back on your first charge.
Regular price after the founding 100
Standard $9.99/month
48-hour free trial, then $9.99 a month. Cancel anytime.
Opens secure checkout. Your card isn't charged until the 2 free days end. Cancel before then and you pay nothing. 7-day money-back on your first charge.
Questions
What does RE Underwrite Lab do?
It runs the math on a real estate deal. Type the price, rehab, rent, and loan terms, and it shows profit, max offer, cash needed, cash flow, returns, and a letter grade, then turns the deal into a PDF report.
Which calculators are free?
Twenty-two quick tools are free with no account: ARV, rehab cost, 70% rule, cap rate, cash-on-cash, 1% rule, keep or sell, seller financing, wraparound, novation, subject-to, assumable mortgage, DSCR, hard money, hotel, self-storage underwriting, cash-out refinance, seller net sheet, RV park underwriting, mobile home park underwriting, laundromat valuation, and car wash valuation. The seven full calculators (fix and flip, BRRRR, long-term rental, short-term rental, wholesale, multifamily, and investor mortgage) are in Pro. You can try the flip, BRRRR, and rental calculators in the demo right now, with no signup and no card.
What does the 48-hour trial include?
After you add a card, a new account can use the fix-and-flip, BRRRR, long-term rental, wholesale, short-term rental, multifamily, and investor mortgage calculators, save deals, compare them, and export branded PDFs (flip, short-term rental, multifamily, and mortgage) for 48 hours. You are not charged during that trial. The subscription auto-renews until you cancel online.
When does a card get charged?
A card is required before the 48-hour trial starts. Checkout shows '2 days free'. Your card is first charged, at the plan price you picked, when those 2 free days end. The plan then auto-renews until you cancel. Cancel online from the plan page before the first charge and you pay nothing. 7-day money-back on your first charge.
What is the founding price?
Founding member is $5.99 a month for the first 100 subscribers, and it stays $5.99 for as long as that subscription is active. Once 100 founding spots are taken, the offer closes.
What is the annual price?
$99 a year is $8.25 a month, $20.88 less than 12 months at the standard $9.99.
Can I get a refund?
Ask within 7 days of the first charge and we refund that charge. The free trial is not a charge. Later renewals are not refunded unless the law requires it.
Does it pull comps or manage the rehab?
No. You bring the numbers, and it does the underwriting. There is no comps data, line-item rehab estimator, or project management in this version.
Is this financial advice?
No. The calculators and PDFs are estimates from the numbers you enter. They are not financial, legal, tax, or investment advice. Verify every figure before you make an offer.
Anything else: contact@reunderwritelab.com
Estimates only. Not financial, legal, tax, or investment advice. RE Underwrite Lab calculators and PDF reports provide educational estimates based on the numbers you enter. Actual purchase costs, rents, expenses, financing terms, taxes, insurance, vacancy, rehab costs, refinance eligibility, and returns vary by property, market, lender, and local law (including short-term rental rules). We do not guarantee any outcome, profit, cash flow, or appraisal. Some content and tools may be generated or assisted by artificial intelligence and can contain errors. Always verify assumptions with licensed professionals and your own due diligence before making decisions.