The BRRRR costs nobody puts in the spreadsheet, and why no money left in rarely survives them
A BRRRR rarely leaves no money in once you count holding costs. Loan points, months of interest on a vacant house, taxes, insurance, utilities and two sets of closing costs all add to what you put in. In our engine run, a deal that looked like every dollar back left $25,820 in the house.
Here's a deal that looks perfect on the napkin.
You buy a tired house for $140,000 and put $40,000 into it. That's $180,000 in. It appraises at $240,000, the lender refinances at 75%, and 75% of $240,000 is... $180,000. Every dollar back. Infinite return, right?
We ran that exact deal through the BuyBox calculation engine twice. The napkin version agrees with you: nothing left in. The full version, with the costs a real BRRRR actually pays, leaves $25,820 of your money sitting in the house. Same house, same rehab, same appraisal.
Nothing in your napkin math is wrong. Your purchase, rehab, ARV and 75% are all correct! The problem is what the napkin never had a line for, and that's what this post is about.
What the napkin leaves out
A BRRRR isn't one transaction for you. It's a purchase, a construction project, a few months of owning an empty house, and a second loan. Each stage sends you a bill, and your spreadsheet needs a line for every one. The common ones:
- Closing costs on the purchase. Title, lender fees, recording. Ours are 2.5% of the price.
- Points on the bridge loan. A short-term lender charges a percentage of the loan up front. Ours charges 2.5 points.
- Interest while nothing is rented. Every month of rehab and lease-up, the bridge loan bills you. At 12%, that adds up FAST.
- Carrying costs. Property taxes, insurance and utilities don't pause for a renovation.
- Closing costs on the refinance. You close a second time: lender fee, appraisal, title, recording. Ours are 3% of the new loan.
None of these is exotic. Every one of them shows up on your settlement statement. They just don't show up on your napkin, because the napkin was built to answer "is there enough spread?" and not "how much of my cash comes back?"
The same deal, every line
Here are the inputs we used. Swap in your own as you read. The financing is a common bridge setup: the lender funds 90% of purchase plus rehab, and you bring the other 10% plus ALL the costs.
| Input | Value |
|---|---|
| Purchase price | $140,000 |
| Rehab | $40,000 |
| ARV (appraised after rehab) | $240,000 |
| Bridge loan | 90% of purchase + rehab, 12% interest, 2.5 points |
| Hold (rehab plus lease-up) | 6 months |
| Monthly carrying costs during the hold | $225 taxes, $125 insurance, $175 utilities |
| Refinance | 75% of ARV, 7.25%, 30 years, 3% closing costs |
And here's where the money goes, straight from the engine run:
| Line | Amount |
|---|---|
| Your 10% of purchase + rehab | $18,000 |
| Purchase closing costs (2.5%) | $3,500 |
| Points (2.5% of the $162,000 bridge loan) | $4,050 |
| Interest, 6 months at 12% ($1,620 a month) | $9,720 |
| Taxes, insurance, utilities ($525 a month × 6) | $3,150 |
| Cash you put in before the refinance | $38,420 |
| New loan (75% of $240,000) | $180,000 |
| Less refinance closing costs (3%) | −$5,400 |
| Less paying off the bridge loan | −$162,000 |
| Cash that comes back to you | $12,600 |
| Cash left in the deal | $25,820 |
Now look at what your $25,820 is made of. Purchase closing ($3,500), the hold ($16,920) and the refinance closing ($5,400) add up to exactly $25,820. The napkin wasn't off by a rounding error. It was off by precisely the three stages it skipped.
Read that hold number again. Sixteen thousand nine hundred twenty dollars, for owning an empty house for six months. That's an average of $2,820 every month the place isn't rented. Would you have guessed that number before you saw it?
The three levers that actually move it
Once you can see the lines, you can see which ones you control and which ones control you. We changed one input at a time and reran the engine.
| Change | Cash left in | vs. base |
|---|---|---|
| Base case (6-month hold, 2.5 points) | $25,820 | |
| Hold runs 9 months instead of 6 | $32,255 | +$6,435 |
| 1.5 points instead of 2.5 | $24,200 | −$1,620 |
| ARV comes in 10% light ($216,000) | $43,280 | +$17,460 |
| 9-month hold AND 10% light ARV | $49,715 | +$23,895 |
Time is the big one you control. Each extra month costs $2,145 here: $1,620 of interest plus $525 of carrying costs. Three months of permit delays or a slow lease-up is $6,435 that does not come back at the refinance. If your lender wants a seasoning period before it will refinance, those months belong in the hold too, so ask about it before you buy, not after.
Points matter less than people argue about. Shaving a full point saves you $1,620. Nice, but it's a quarter of what three slow months cost you. Don't let a points debate distract you from your timeline! A cheaper lender who funds draws slowly can easily be the more expensive lender!
The appraisal is the lever you don't control. At $216,000, the new loan is $162,000, and after $4,860 of refinance costs it doesn't even pay off the bridge. You'd write a check at closing, and $43,280 stays in. That's the scenario to stress-test before you make an offer, because once the house is bought, you can't negotiate with an appraiser.
What does "no money left in" actually take?
We asked the engine a simple question: with all these costs in, what ARV gets this deal back to zero?
The answer is $276,000, in $1,000 steps. That's $36,000 more value than the napkin needed, on the same purchase and the same rehab.
And there's a catch on the other side for you. A loan that big (75% of $276,000 at 7.25%) has a payment the rent can't quite carry: the engine shows cash flow of about −$133 a month and a DSCR of 0.98 at $2,100 rent. At the $240,000 appraisal, the same house cash flows about $51 a month with a DSCR of 1.12. So the version of this deal that gets every dollar back is also the version that costs you money every month. That trade is real, and it's worth deciding on purpose.
None of this means the deal is bad. Leaving $25,820 in a house that rents for $2,100 might be a perfectly good investment. What matters is that you know your number BEFORE you buy, so that "I'll get it all back" isn't the plan your next deal depends on.
How to put these lines in your own analysis
- Price the hold in months, not as one lump. Interest plus taxes, insurance and utilities, times the months you realistically expect. Then add two or three months and look again.
- Count both closings. The purchase and the refinance each have their own costs. Ask your refinance lender for an estimate of theirs early.
- Use the lender's real terms. Points, rate, what share of rehab they fund, and how fast they release draws.
- Run the appraisal 10% light. If the deal only works at full ARV, you know exactly how much of your plan rests on one person's opinion.
- Check the payment the refinance creates. Pulling more cash out means a bigger loan. Make sure the rent still covers it. Our DSCR guide walks through the ratio.
Where BuyBox fits
We built BuyBox because the lines in this post are the ones that go missing when a deal gets rushed. In a BuyBox analysis the bridge points, the monthly interest during the hold, the carrying costs and the refinance closing costs are all inputs, and the cash left in the deal is computed from them, not typed in. You can hover any result to see exactly how it was derived. It won't make the appraisal come in higher. It will make sure you've seen the version where it doesn't.
Frequently asked
Are holding costs the same as carrying costs?
People use both terms loosely. In this post, carrying costs are taxes, insurance and utilities, and holding costs are carrying costs plus the loan's interest and points during the hold. Whatever you call them, your test is the same: does your analysis include every bill you pay before the house is rented?
Do I pay bridge loan interest during the seasoning period too?
Usually, YES. If you can't refinance until a lender's seasoning period is over, the bridge loan stays in place and keeps billing you. Rent from a tenant during those months offsets some of it, which is why getting the house leased quickly matters so much.
Can I roll the refinance closing costs into the new loan?
Sometimes, but the money still comes out of the same place. If the costs are financed, the cash you receive at closing is smaller by the same amount, so the cash left in the deal doesn't change. Check how your lender handles it before you sign, and see when to refinance a BRRRR for the timing side of the decision.
This post is education, not investment, tax or legal advice. Every figure comes from the worked example above; your lender's terms, your taxes and your appraisal will differ.