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Guides & Insights

Plain-English breakdowns of the numbers behind real estate deals — with the calculators to run them yourself.

What Is a Good Cap Rate for Rental Property?

The honest answer is "it depends" — but here are the real 2026 ranges, and how to know if a deal is actually good.

The 70% Rule for House Flipping, Explained

The one-line formula that keeps flippers from overpaying — plus when to bend it and when it will burn you.

The BRRRR Method: A Step-by-Step Guide

Buy, Rehab, Rent, Refinance, Repeat — how to recycle the same down payment into a whole portfolio, and where it goes wrong.

How Much House Can You Really Afford?

The 28/36 rule, what lenders actually check, and why the number they approve isn’t the number you should spend.

How to Get Rid of PMI (and Stop Overpaying)

The 80% request, the 78% automatic drop, and the appraisal trick that can kill PMI years early.

What Is a Good Gross Rent Multiplier?

The fastest screen in rental investing — the typical 4–12 ranges, and why the national average is useless.

The 1% Rule and 50% Rule for Rentals

Two ten-second gut-checks every landlord quotes — how they work, and why they fail in half the country.

How Mortgage Payments Actually Work

PITI, amortization, and why your early payments are almost all interest — explained in plain English.

When Does Refinancing Make Sense?

Forget the old 1% rule — in 2026 the only number that matters is your break-even point.

What Is a DSCR Loan? A Guide for Investors

The loan that qualifies your property instead of you — how DSCR works and what lenders want in 2026.

Cost Segregation Explained (and Why 2026 Is Huge)

The tax strategy that front-loads depreciation — now supercharged by permanent 100% bonus depreciation.

What Is a 1031 Exchange? The 45/180-Day Rules

How to sell an investment property and defer the capital gains tax entirely — if you hit two unforgiving deadlines.

How to Calculate Airbnb Income (ADR, Occupancy, RevPAR)

The three numbers that predict what a short-term rental will actually earn — and the 2026 benchmarks to judge them against.

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The BRRRR Method: A Step-by-Step Guide

BRRRR is the strategy that lets you build a rental portfolio without needing a fresh down payment for every property. Done right, you buy one distressed house, fix it, rent it, refinance most of your cash back out, and use that same money to do it again. Here's how the cycle actually works — and where it bites people.

What BRRRR stands for

Buy, Rehab, Rent, Refinance, Repeat (xREI). The whole point is capital recycling: instead of leaving $50,000 trapped in one property, you pull it back out and redeploy it. Run your own numbers alongside this guide with the BRRRR calculator.

Step 1 — Buy (below market)

Everything hinges on buying at a discount. Your target is generally 65%–75% of ARV minus rehab costs — and in 2026's higher-rate environment, smart investors are leaning toward 65% for a bigger safety margin (OwnLuxuryHomes). Look for foreclosures, estate/probate sales, tired landlords, and MLS listings that have sat 60+ days. This is the same discipline as the 70% rule for flips — you make your money when you buy.

Step 2 — Rehab (force equity)

The goal is to bring the property up to your neighborhood's rental standard — not to build a showpiece. Focus on high-ROI work: cosmetic kitchen and bath updates, flooring, fresh paint, lighting, curb appeal, and any deferred maintenance (roof, HVAC, plumbing) that a lender or appraiser will flag (xREI). You're forcing equity, not chasing HGTV.

Step 3 — Rent (stabilize)

Most lenders won't do a cash-out refinance until the property is leased, so get a qualified tenant in quickly. Screen hard — credit, income, and rental history — and price against comps within a half-mile. A stabilized, leased property is what unlocks the refinance.

Step 4 — Refinance (get your cash back)

This is the magic step. Once the property appraises at its new, higher value, you do a cash-out refinance — typically at 70%–75% LTV — and pull your capital back out. Here's the classic example: ARV of $200,000, bought and rehabbed all-in for $130,000, refinanced at 75% LTV = $150,000. You pull out $20,000 more than you invested, and you still own a cash-flowing rental (Investor Verdict).

Two things to plan for:

  • Seasoning period: Most lenders make you wait 3–12 months (commonly 6 months) before they'll refinance based on the new appraised value, not your purchase price (Amerisave). Check the BRRRR seasoning calculator to time it.
  • The DSCR test: The refinance only works if the rent covers the new loan. Lenders want gross rent ÷ (principal + interest + taxes + insurance) at roughly 1.0–1.25x. At 7%–8% rates, marginal deals fail this test (OwnLuxuryHomes). Run it on the DSCR loan calculator.

Step 5 — Repeat

Take the capital you pulled out and go do it again. A full BRRRR cycle usually runs 12–18 months start to finish (OwnLuxuryHomes). Rinse and repeat, and the same dollars build a portfolio.

Where BRRRR goes wrong

The strategy is powerful but unforgiving. The three killers:

  • A low appraisal. If the property doesn't appraise where you expected, you can't pull all your cash out — and you're stuck with money trapped in the deal.
  • The DSCR fails. At today's rates, if the rent doesn't cover the refinanced payment, the deal doesn't work. When DSCR fails or cash flow is marginal, flipping is often the better play (OwnLuxuryHomes).
  • Rehab overruns. Every dollar over budget is a dollar you may never get back in the refinance. Pad your estimates.

BRRRR isn't passive and it isn't a get-rich-quick scheme — it's a disciplined system that rewards buying right and running the numbers before you commit. Model your next deal end-to-end with the BRRRR calculator before you make an offer.

Ready to run your own numbers?

Open the BRRRR Calculator →
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About REI Calc

REI Calc is a free suite of 25 real estate investment calculators built for the people who actually run the numbers on deals — landlords, house flippers, short-term rental hosts, wholesalers, and buy-and-hold investors.

Why we built it

Most real estate math lives in messy spreadsheets or behind sign-up walls. We wanted a single, fast, private place to answer the questions investors ask before every deal: What's the cap rate? Does this cash-flow? Is the flip worth it at this price? How much equity can I pull with a HELOC? Every calculator gives you an instant answer and explains the formula beneath it, so you learn the math as you use it.

Who's behind it

REI Calc is run by a hands-on property investor based in Springfield, Missouri, who manages short-term and long-term rentals. The tools reflect real workflows used to evaluate, finance, and operate income properties — not textbook theory. As the site grows we're adding guides, worked examples, and market insights to help newer investors make confident, numbers-first decisions.

How it works

Everything runs in your browser. You type in your numbers, the calculator updates instantly, and nothing you enter is stored or sent anywhere. There's no account to create and no cost — the site is supported by advertising so the tools can stay free for everyone.

A note on accuracy

REI Calc provides estimates for educational purposes only and does not constitute financial, tax, legal, or investment advice. Formulas follow standard industry conventions, but real-world costs, taxes, rates, and returns vary. Always confirm your assumptions and consult a qualified professional before making a real estate decision.

Questions or feedback? Get in touch — we read every message.

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Contact us

Have a question, spotted a bug, or want to suggest a calculator we're missing? We'd love to hear from you.

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Privacy Policy

Last updated: July 2026. This policy explains what information REI Calc collects, how it's used, and the choices you have.

The short version

The numbers you type into our calculators are processed entirely in your browser. We do not store, transmit, or have access to the figures you enter. We do use standard web analytics and advertising services, which are described below.

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The Rental Property Deal Analyzer Checklist

The 12 numbers every investor should run before making an offer — with the exact calculator for each. Get the free PDF and occasional new-tool updates. No spam, unsubscribe anytime.