Working Backward From the Refi: How to Set a BRRRR Offer That Gets Your Cash Back Out

The Refi Gap: The One BRRRR Number That Decides Whether Your Cash Comes Back

Most BRRRR investors fixate on the purchase price and the rehab budget. The number that actually decides whether you recycle your capital shows up months later, when the bank's appraiser walks through the finished house. If the new loan does not cover what you spent, the difference stays locked in the property. That leftover amount is the refi gap, and it should drive your offer from day one.

Here is how the cash-out refinance works. After the rehab, you apply for a new long-term loan, and the lender pays off your purchase financing (usually hard money) out of the proceeds. The new loan is capped at a loan-to-value ratio, typically 70% to 75%. That percentage applies to the value the lender's appraiser assigns, not the ARV you penciled in before buying. On a house that appraises at $200,000, a 75% LTV caps the new loan at $150,000, no matter how much you have in it.

The refi gap is simple: total all-in cost minus the new loan amount. If you are all-in at $165,000 and the lender funds $150,000, you have a $15,000 gap that stays in the deal. A gap of zero or less means you pulled out everything you put in. The trouble is that most investors undercount "all-in," so the gap looks smaller on paper than it does at the closing table.

Your all-in cost should include every dollar you spend from acquisition to refi:

• Purchase price
• Rehab costs, including contingency overruns
• Hard money points paid at origination
• Interest paid during the rehab and seasoning period
• Holding costs: property taxes, insurance, and utilities
• Purchase closing costs (title, escrow, recording, lender fees)
• Refi closing costs (appraisal, title, origination on the new loan)

Leave out any one of these and your offer math is wrong before you start. Hard money points and six months of interest alone can add several thousand dollars on a modest deal. Refi closing costs get forgotten most often because they hit at the very end. Build the full list into your numbers first, then work backward to the price that closes the gap.

Worked Example: How Much Cash a $120,000 Purchase Leaves in the Deal

Say you find a three-bed house with an ARV of $200,000. You buy it for $120,000 and budget $35,000 for rehab. A hard money lender covers 90% of the purchase plus 100% of the rehab, so the loan is $108,000 + $35,000 = $143,000 at 12% interest and 2 points. Your down payment is $12,000.

Here is every dollar that goes into the deal before the refi:

• Purchase: $120,000
• Rehab: $35,000
• Points (2% of $143,000): $2,860
• Interest ($143,000 x 12% / 12 = $1,430/month x 6 months): $8,580
• Holding costs ($450/month x 6 months): $2,700
• Purchase closing costs: $3,000
• Refi closing costs: $4,000

That totals an all-in cost of $176,140. When the house appraises at $200,000, a 75% LTV cash-out refi gives you a new loan of $150,000. That loan pays off the $143,000 hard money balance and returns $7,000 to you. You put $33,140 of your own cash in and got $7,000 back, so $26,140 stays trapped ($176,140 - $150,000).

Now check whether the rental justifies leaving that cash behind. At 7.5% on a 30-year loan, the $150,000 mortgage runs about $1,049/month in principal and interest. Rent is $1,750. Operating expenses: taxes $175, insurance $90, vacancy at 5% ($88), maintenance and capex at 10% ($175), and management at 8% ($140), which adds up to $668. Total monthly outflow is $1,717, which leaves $33 of cash flow per month, or $396 per year.

Cash-on-cash return = annual pre-tax cash flow / total cash invested. That works out to $396 / $26,140 = 1.5%. You would earn more in a savings account, and you have taken on a leveraged rental to get it. The deal itself isn't bad, since you added roughly $24,000 in equity. The problem is that the offer price left too much of your capital stuck in the property, and that is exactly what the next section fixes.

Worked Example: Reverse-Engineering a BRRRR Max Offer

Most investors start with the asking price and hope the refi works out. Flip that order. Start from the refi loan and work backward to the highest price you can pay while still pulling your cash out. Using a $200,000 ARV and a 75% LTV refi, the new loan comes to $150,000. If your goal is to leave no more than $5,000 in the deal, your maximum all-in cost is $150,000 + $5,000 = $155,000.

Next, subtract everything that isn't the purchase price. On this deal, that adds up to about $56,100:

• Rehab: $35,000
• Holding costs (taxes, insurance, utilities at $450/month for 6 months): $2,700
• Purchase closing costs: $3,000
• Refi closing costs: $4,000
• Financing (points, 6 months of interest, lender fees): about $11,400

That leaves $155,000 - $56,100 = $98,900, so your max offer is roughly $99,000. Now compare it to the classic 70% rule: ($200,000 x 0.70) - $35,000 = $105,000. If you paid $105,000, your all-in would be $161,100. After the $150,000 refi, you'd have about $11,100 stuck in the property, more than double your target. The deal works as a flip, but it traps cash as a BRRRR.

Timing moves the number too. Say the rehab runs long or the lender's seasoning rules push your refi out two more months. At roughly $1,430 per month in hard money interest, that adds $2,860. Another $900 in holding costs brings the total to about $3,760. Your all-in rises by that amount, so your max offer drops to around $95,000 if you still want only $5,000 left in.

The lesson is simple. Your BRRRR offer should come from the refi math on your actual timeline, not from a flipper's rule of thumb. Build a buffer for a slower refi before you make the offer, because once you close, the only number you control is what you paid.

Edge Cases That Move the Math: Seasoning, Low Appraisals, Draws, and DSCR

Your max offer only holds if the refi happens on the terms you modeled. Seasoning is the first variable. Many lenders require you to own the property for a set number of months before they will lend on the new appraised value. Until then, some cap the loan at your purchase price (sometimes plus documented rehab). Every extra month adds interest, taxes, insurance, and utilities, so build the full seasoning period into your holding costs before you commit to an offer.

A low appraisal cuts the refi loan directly. At 75% loan-to-value, a $200,000 appraisal supports a $150,000 loan. If the appraiser comes in at $190,000, the loan drops to $142,500 ($190,000 x 0.75). That $7,500 shortfall stays trapped in the deal. Run your numbers again at an ARV a few percent below your comp estimate and decide whether you can live with that much cash left in.

Front-end financing also moves the result. Most rehab lenders release funds in draws as work is completed, and you pay interest only on the money released. On a $40,000 rehab budget at 12%, interest on the full amount runs $400 a month. If your average outstanding balance is closer to $20,000, you pay about $200 a month instead. Private money from individuals sometimes skips origination points entirely, and avoiding 2 points on a $150,000 loan saves $3,000.

DSCR lenders size the loan to the rent, not just the value. They divide monthly rent by the full payment (principal, interest, taxes, insurance, and any HOA). If rent is $1,650 and the lender requires a 1.20 ratio, the payment cannot exceed $1,375 ($1,650 / 1.20), even when the appraisal supports a larger loan. Weak rent can cap your refi below the LTV limit.

Every lender writes these rules differently, so treat the figures above as examples, not market standards. Before you make an offer, ask your lender for their seasoning period, maximum LTV, which value they lend against, DSCR minimum, and points. Plug their actual answers into your model so the max offer reflects the loan you will really get.

Common BRRRR Financing Mistakes That Trap Cash

Most BRRRR deals that leave money stuck don't fail on the rehab. They fail on financing assumptions the investor never stress-tested. The figures below come from the $120,000 purchase example earlier: a $40,000 rehab, a $200,000 ARV, and hard money at 12%. Each mistake is paired with a fix and what it costs you.

1. Using your own ARV. You expect $200,000, but the appraiser lands at $185,000. At 75% LTV, that drops your loan from $150,000 to $138,750, which leaves $11,250 more in the deal. Fix: underwrite off your lowest defensible comp.
2. Assuming 80% LTV. Many lenders cap cash-out refis on investment property at 75%. On a $185,000 appraisal, 80% gives $148,000 and 75% gives $138,750. That is a $9,250 gap. Fix: get the lender's LTV in writing before you offer.
3. Forgetting refi closing costs. Budget 2% to 3% of the new loan, roughly $4,160 on $138,750. Fix: subtract these costs from your loan proceeds, not from your profit.
4. Charging interest only on the purchase. If your lender funds the rehab too, 12% on $40,000 for six months adds $2,400. Fix: calculate interest on total funds drawn.
5. Optimistic rent. If you assume $1,750 but the lender's rent schedule says $1,600, the loan may miss a 1.25 DSCR at today's rate. The lender then sizes the loan down. Fix: run DSCR using the appraiser's market rent.
6. Ignoring seasoning. A six-month seasoning rule can add three months of holding costs. At about $1,500 per month, that is $4,500. Fix: confirm seasoning rules before closing on the purchase.

Stack the first four mistakes and you can leave more than $25,000 in a deal you planned to fully refinance. On a $160,000 all-in project, that money could have funded a down payment on the next one. Run every assumption at the lender's numbers, not yours, before you sign the purchase contract.

BRRRR Refi FAQ

Is leaving some cash in a BRRRR always bad? No. A perfect 100% cash-out is a nice target, but it isn't the only way a deal works. If you leave $8,000 in a rental that cash flows $250 a month, that's $3,000 a year on $8,000 invested, a 37.5% cash-on-cash return. Decide your maximum acceptable cash left in before you make an offer, then hold to it.

Should I use the 70% rule for BRRRR offers? Use it as a sanity check, not as your ceiling. The 70% rule was built for flips, where your exit is a sale. In a BRRRR your exit is a refi, so your real limit is the lender's loan-to-value. On a $200,000 ARV at 75% LTV, the refi loan is $150,000, and your purchase, rehab, holding, and closing costs together need to land at or under that number if you want all your cash back.

How long do lenders usually require for seasoning? It depends on the lender. Some will refinance on appraised value soon after closing, while others cap you at your purchase price plus documented rehab until you've owned the property for a set number of months. Call two or three refi lenders before you buy and get their seasoning rules in writing. That way you aren't surprised by them six months later.

What happens if the appraisal comes in low? Your loan shrinks and more cash stays trapped. At 75% LTV, every $10,000 the appraisal falls short costs you $7,500 in refi proceeds. Give the appraiser your comps and a line-item list of renovations. If the value still comes in short, you can request a reconsideration of value, try a different lender, or hold the property and refi later.

How do I run this fast? Paste the address into FlipSmrt. It returns a comp-based ARV, a line-item rehab budget, and the deal math. Plug those numbers into the refi gap formula (total cash in minus refi loan) and you'll know your max offer in minutes, without rebuilding a spreadsheet for every property.