BRRRR calculator

The entire point of BRRRR is to force appreciation through renovation, then borrow against that new value to get your money back. If you buy at $140,000, put $55,000 into rehab and costs, and the renovated property appraises at $260,000, a 75 percent cash-out refinance is a $195,000 loan. Exactly the $195,000 you had in. You walk away owning a rental with none of your own cash trapped, free to do it again. That recycling is what lets investors scale a portfolio far faster than saving up a fresh down payment each time.

The refinance is where it lives or dies

Two things decide whether you recover your capital: the appraised ARV and the lender's LTV cap. An appraisal that comes in 10 percent light, or an LTV of 70 instead of 75, can leave $20,000–$30,000 stranded in the deal: turning a repeatable machine into a one-off. And the new loan still has to leave positive cash flow, which is exactly the constraint that higher interest rates have tightened.

The number nobody wants to check twice

Rehab budgets are optimistic by nature, and the overage always comes out of your recovered capital. Pad the rehab, use conservative comps for the ARV, and confirm the rent against real listings, because in BRRRR, every dollar those three are wrong by is a dollar of your own money that stays locked up.

Here's the honest tension BRRRR always has at today's rates: this deal returns 100 percent of the capital, an "infinite return" on paper, but the refinanced payment leaves it $43 a month in the red. That's not a pass. Either buy $10,000 cheaper, hit a slightly higher ARV, or accept leaving a little cash in for a loan small enough to cash-flow. The calculator lets you find that balance in a few keystrokes.

Buy

Below after-repair value, by enough that the eventual refinance can return your capital. This is the stage that decides everything downstream: a BRRRR that fails almost always failed here, and no amount of good execution on the other four recovers a purchase price that was too high. Work the number backwards from the refinance rather than forwards from the asking price: how to calculate MAO covers the same arithmetic for flips.

Rehab

To the standard the ARV comps are set at, and no further. Over-improving raises your cost without raising the appraisal, because the appraiser is comparing to the same neighborhood sales you did. Scope it by category with a contingency: the rehab budget calculator itemizes it and gives you cost per square foot.

Rent

Before the refinance, not after. Most cash-out lenders want the property leased, and the rent has to support the new payment, which is the constraint that ends most BRRRRs at today's rates. Check the rent against real listings rather than an estimate, and run it through the rental cash flow calculator.

Refinance

A cash-out refinance against the new appraised value, typically capped at 70–75% LTV on an investment property. The appraisal is the moment your ARV estimate gets marked to market.

Repeat

With the recovered capital, into the next one. The recycling is the entire point. It's what lets a fixed amount of capital acquire several properties instead of one, and it only works if the previous four stages actually returned the money.

"Cash left in the deal" is your total investment minus what the refinance hands back. It is the number the whole strategy turns on, and four assumptions decide it:

Two of these are worth stating plainly because they surprise people. Seasoning rules vary by lender and change. Ask before you plan a timeline around them. And an appraisal miss is levered: at 75% LTV it costs you 75 cents of returned capital per dollar of value, on top of whatever it does to your equity.

"Infinite return" simply means cash left in reached zero: the loan returned everything you put in, so cash-on-cash has no denominator. It is a real and good outcome, but it is not automatically a good deal the worked example above returns 100% of the capital and still loses $43 a month, which is a property you'd be paying to own.

• A wide gap between all-in cost and ARV. All-in at 75% of ARV or less is what makes a full capital return arithmetically possible at a 75% LTV cap. Anything above that leaves cash in by construction, however well the rehab goes.
• Rent that carries the refinanced payment with room to spare. The new loan is bigger than a normal purchase mortgage on the same property, so the rent has to be strong relative to value. Check DSCR at the refinanced loan, not at the purchase loan.
• Forced appreciation, not market appreciation. The value has to come from work you control. A plan that needs the market to rise 8% before the appraisal is a bet, not a strategy.
• A scope you've done before. Rehab overruns come straight out of recovered capital, and they are the second most common failure after a light appraisal.
• A property you'd hold anyway. If the refinance disappoints you own it regardless, so the deal has to survive the case where you only get 80% of your money back. Run it as an ordinary rental on the cash-on-cash calculator and check it still passes your buy box.