Why BRRRR deal analysis requires a different lens
The BRRRR strategy — Buy, Rehab, Rent, Refinance, Repeat — is one of the most capital-efficient ways to build a rental portfolio. Done right, you recycle a large portion of your down payment through a cash-out refinance, then deploy it into the next deal. Done wrong, you end up with a property that doesn't cash flow, a loan you can't refinance at the numbers you underwrote, and equity that's permanently stuck.
The reason most BRRRR deals underperform isn't bad execution on the rehab — it's bad underwriting upfront. Investors anchor on ARV before they have real comps. They use contractor estimates rather than signed bids. They ignore holding costs. They assume they'll qualify for a refinance at 75% LTV without verifying the lender's actual requirements. And they model rent at the top of the range rather than the median.
This checklist doesn't remove execution risk — but it eliminates the most preventable underwriting errors. Run every deal through these 12 numbers. If the math doesn't hold at conservative inputs, walk away. The next deal is always better than a bad one you're already in.
If you want to run this analysis faster, TerraLine's BRRRR strategy calculator steps through all 12 numbers automatically — no spreadsheet required.
The 12 numbers
We'll walk through each number in sequence, because the output of one feeds directly into the next. We're using a single worked example — a 3/1 single-family in a Midwest market — so you can see exactly how errors compound downstream.
1After-Repair Value (ARV)
ARV is the foundation of every other number. Overstate it and every downstream figure is wrong. Pull at least three closed sales within 0.5 miles in the last 90 days, make bracketed adjustments for bed/bath/SF deltas, and use the median — not the highest.
2Purchase Price
Simple — but the discipline is refusing to chase the deal when you can't negotiate down to a purchase price that leaves room for rehab, carry, and a margin of safety. Walking away is a return on capital that never shows up in a spreadsheet.
3Rehab Budget
Line-item your rehab. A round number pulled from a per-SF rule-of-thumb is not a budget — it's a guess. Get a signed bid for at least the major scopes (roof, mechanicals, kitchen/bath), then add 10–15% contingency. First-timers routinely underestimate by 20–30%.
4Holding Costs
Every month you own a vacant property, the meter runs. Model holding costs for your realistic rehab timeline plus a one- to two-month buffer for permit delays, contractor reschedules, or weather. Do not use best-case timelines.
5All-in Basis
This is your total cost before refinancing. It is the number your ARV must comfortably cover. The classic BRRRR rule is all-in basis ≤ 70% of ARV. At $175k on a $210k ARV: $175k / $210k = 83.3% — a clear red flag that would require renegotiation of the purchase price or scope.
6Refinance LTV Cap
Every DSCR and portfolio lender has a published maximum LTV on cash-out refinances of non-owner-occupied properties. In 2024–2026 most DSCR lenders sit at 70–75%. Know your lender's cap before you run any other refi math — it is the ceiling everything else flows from.
7Refinance Loan Amount
The actual loan you will carry after the refi. This number drives both your monthly PITI (cost) and how much equity you pull out (capital recycling). It is also the figure the appraiser's value must support — so a conservative ARV protects you from a short appraisal.
8Cash Left in Deal
This is your unrecycled equity — the capital still trapped in the property after the refinance. Zero is ideal; a small positive number is fine. The danger is a large residual that ties up capital you need for the next deal. In this example, $17,500 on a $210k ARV is 8.3% — stretched but workable.
9Market Rent
Use current active listings and recently rented comps — not pro-forma rent that assumes top-of-market. Stress-test with a 5% vacancy haircut. If the deal only works at peak rent, it is not a deal.
10Monthly PITI Post-Refi
Model PITI at a realistic rate — not the best rate you think you might qualify for. DSCR lenders underwrite at the note rate, and a 50bps swing can push you below their minimum coverage ratio. Include landlord insurance (not owner-occupied), and budget for PM fees if you will not self-manage.
11Debt Service Coverage Ratio (DSCR)
DSCR is the number lenders care about most. A 1.0× DSCR means gross rent exactly covers debt service — nothing left for vacancy, repairs, PM, or CapEx. Most lenders require a minimum of 1.15–1.25×. In our worked example, this deal fails the DSCR test. The fix: negotiate a lower purchase price to reduce loan balance, or confirm rent supports a higher number.
12Cash-on-Cash Yield
Cash-on-cash tells you what your trapped equity is actually earning. A negative CoC means you are subsidizing the tenant's housing. Target ≥ 10% CoC on the cash you cannot pull out. If CoC is marginal, calculate whether deploying that residual into another deal would outperform.
What the worked example tells us
In the example above — $115k purchase, $47k rehab, $8.4k holding costs — the deal fails two key tests:
- All-in basis / ARV = 83% — well above the 70–75% target. At 75% LTV the refi loan of $157.5k doesn't cover the $175k all-in, meaning you don't fully recycle equity.
- DSCR = 1.008× — below every lender's minimum threshold and negative after vacancy and CapEx.
The fix isn't to hope the appraiser comes in higher or that interest rates drop. The fix is to negotiate the purchase price down to ~$95k — which changes the all-in to $155k, the all-in/ARV to 73.8%, and leaves genuine DSCR headroom. If the seller won't move, walk away. The discipline of walking away is what makes BRRRR work at scale.
Safe · Stretched · Dangerous thresholds
Use this table as a quick deal-health check. If two or more metrics land in "Dangerous," the deal requires a material renegotiation or a pass.
| Metric | Safe ✓ | Stretched ⚠ | Dangerous ✗ |
|---|---|---|---|
| ARV confidence | ≥ 3 closed comps within 0.5 mi / 90 days | 2 comps or 90–180 days old | 1 comp, >6 months old, or adjusted > 10% |
| All-in basis / ARV | ≤ 70% | 71–75% | > 75% |
| Refinance LTV | ≤ 75% DSCR loan; ≤ 80% portfolio | 76–80% DSCR | > 80% — most lenders won't touch |
| Cash left in deal | ≤ 5% of ARV (close to zero-out) | 6–12% of ARV | > 15% of ARV — refi didn't recycle equity |
| DSCR | ≥ 1.25× | 1.10–1.24× | < 1.10× — most lenders require minimum 1.15–1.20× |
| Cash-on-cash yield | ≥ 10% on residual equity | 7–9% | < 7% — barely beats index fund returns |
| Rehab budget contingency | 10–15% buffer included | 5–9% buffer | 0% contingency — any overrun bleeds equity |
The most expensive BRRRR mistakes — and how to avoid them
Using the listing agent's ARV
Pull your own comps. Listing agents represent sellers; their ARV is optimistic by design. Get a desktop appraisal ($125–$175) or BPO if you're serious about a deal.
Treating the rehab estimate as the budget
A verbal estimate from a contractor is not a budget. Get itemized bids for all scopes over $2,000, add 10–15% contingency, and include permit fees and utility reconnection costs explicitly.
Ignoring the refinance seasoning period
Most DSCR lenders require 3–6 months of title seasoning before a cash-out refinance. If your hard-money lender charges 12% and you need 9 months to season, that holding cost is enormous. Know the seasoning requirement before you close.
Modeling rent at Zillow's high estimate
Zillow Rent Zestimate skews high in most markets. Use the median of active listings comparable to your property's condition. If you can't find three active comps, the rental market is thin — which is itself a risk.
Skipping the DSCR stress test
Run DSCR at rent −5% and rate +50bps. If the deal breaks at either, you have no margin of safety. Lenders and markets both move; your underwriting should survive modest adversity.
Counting on appreciation to bail out the deal
BRRRR works because of cash flow and capital recycling — not because values go up. Underwrite for today's rent, today's rates, and today's comps. Appreciation is a bonus, not a thesis.
If you're managing rehab draws on a BRRRR project, TerraLine's construction draw schedule template gives you the phase structure and documentation checklist lenders want to see before each disbursement.
Pre-purchase BRRRR checklist
Run through this checklist before you send the earnest money deposit. Every item should have a verified answer — not an estimate, assumption, or "I'll figure it out."
Comps & ARV
- ≥ 3 closed comps, ≤ 0.5 mi, ≤ 90 days
- Bracketed adjustments documented
- Used median — not high
- Confirmed with local agent or appraiser
Rehab Budget
- Line-item scope from contractor bids
- 10–15% contingency added
- Permits scoped and costs included
- Mechanicals (HVAC, plumbing, electrical) individually bid
Finance & Carry
- Hard-money term and interest rate confirmed
- Hold timeline modeled at realistic pace + 1-month buffer
- All closing costs (purchase + refi) estimated
- Bridge lender's draw process understood
Refinance
- DSCR lender identified and LTV cap confirmed
- Minimum credit score and seasoning period verified
- All-in basis ÷ ARV ≤ 75%
- Cash left in deal < 10% of ARV
Rental Income
- Market rent from active comps, not wishful thinking
- PM fee included if not self-managing
- Vacancy reserve ≥ 5%
- CapEx reserve ≥ 8–10% of gross rent
DSCR & Returns
- DSCR ≥ 1.20× at market rent and actual PITI
- Cash-on-cash ≥ 8% on residual equity
- Stress-tested at rent −5% and rate +50bps
Doing this faster: the TerraLine BRRRR calculator
The 12-number framework above works in any spreadsheet — but it's slow, error-prone, and hard to share with partners or lenders in a clean format. TerraLine's BRRRR strategy calculator walks through each number in sequence, flags when a metric falls into "Stretched" or "Dangerous" territory, and generates a one-page deal summary you can share with your lender or partner.
Once the deal is under contract and you move into rehab, TerraLine connects to your draw schedule so you can track rehab spend against budget in real time — which matters enormously for a strategy where every dollar over rehab budget is a dollar of equity you don't recycle.
See TerraLine's pricing — the base plan covers up to five active deals, which is the right range for investors building a BRRRR portfolio.
Run your next BRRRR deal in TerraLine
Model all 12 numbers, track your rehab draw schedule, and generate a lender-ready deal summary — in one place. Free to start, no credit card required.