What the BRRRR Strategy Actually Does

BRRRR stands for Buy, Rehab, Rent, Refinance, Repeat: a real estate investing approach where you buy a property below its potential value, force appreciation by improving the asset and boosting income, then refinance to pull your original capital back out and roll it into the next deal. On a single-family house, "rehab" usually means a renovation. On multifamily, it means operational value-add: raising under-market rents, adding ancillary income like parking or pet fees, cutting waste, and repositioning the property. This calculator is tuned for the multifamily version. It is a simplified screening tool to estimate how rent and fee increases flow through to cap-rate-driven value and, ultimately, to the cash you can pull out at refinance.

How Cap Rate Valuation Works

Commercial multifamily (5+ units) is valued primarily on its Net Operating Income (NOI) divided by the market capitalization rate, or cap rate:

NOI is your gross income minus operating expenses, before debt service. Cap rate is the unlevered yield the market demands for a given property type and location. The trick that makes BRRRR work at scale is that a dollar of permanent NOI is worth many dollars of value. At a 6% cap rate, $1 of added NOI creates about $16.67 of value. At a 5% cap, that same dollar creates $20 of value. This is why multifamily operators obsess over fee income and rent bumps, because every extra dollar you can permanently add compounds into the asset's resale and refi valuation.

Your refinance loan is then constrained by two things: a maximum loan-to-value (typically 70-75% for agency debt) and a minimum debt-service coverage ratio (usually 1.20-1.30x). This calculator uses a DSCR-based factor as the binding constraint, which is the right assumption when interest rates are elevated and DSCR binds before LTV.

A Worked Example

Imagine you bought a 12-unit building a year ago at a 6.0% cap rate with $100,000 of annual NOI and a $900,000 loan (roughly 54% LTV). Rents were $50 under market and you've identified $25/unit/month of new fee income you can implement, including RUBS billing, reserved parking, and a pet fee program.

• Original value: $100,000 ÷ 6.0% = $1,666,667
• Planned rent increase: 12 units × $150/mo × 12 mo = $21,600/year
• Planned fee income: 12 units × $25/mo × 12 mo = $3,600/year
• Added NOI: $25,200/year
• Future NOI: $125,200/year
• Future value at 6.5% cap: roughly $1,926,000
• Max refi at 75% factor: roughly $1,445,000
• Estimated cash-out: $1,445,000 − $900,000 = about $545,000

That's the raw math, and in theory you could redeploy that $545,000 into the next acquisition. In practice, closing costs, loan seasoning requirements, and a less-favorable cap rate at refi will take a bite. This is why investors underwrite conservatively before buying.

Why Fee Income Punches Above Its Weight

A $25/unit/month fee might feel trivial, but fees tend to flow through to NOI almost 1:1 because they carry no additional operating cost. Rent bumps, by contrast, come with vacancy risk, collections loss, and sometimes turnover. Common value-add fee sources in multifamily:

• RUBS (Ratio Utility Billing System): passing through water, sewer, trash, or gas costs to residents.
• Pet fees & pet rent: one-time fee plus $25-$50/month per pet.
• Reserved parking and covered parking: $25-$100/month in dense markets.
• Storage units: small monthly fee for on-site storage.
• Laundry income: in-unit hookups or common-area machines.
• Admin / tech package / renter's insurance: often bundled.

Common Mistakes to Avoid

• Assuming cap rate compression. If you buy at 6% and underwrite a refi at 5%, you're betting the market will pay more for the same NOI. Bet the other way. Model the refi at a higher cap rate than entry, and anything better is upside.
• Ignoring seasoning requirements. Most lenders require 6-12 months of stabilized operating history at the new rent levels before they'll lend against them. Plan your capital timing around that.
• Forgetting operating expenses on new revenue. Extra rent can mean extra turnover, extra maintenance, and extra property management fees. Fee income is cleaner, but still not 100% flow-through.
• Underestimating refi closing costs. Budget 1-3% of the new loan for origination, appraisal, legal, and title.
• Overlooking DSCR. A lender's max loan is the lower of LTV-based and DSCR-based. In a high-rate environment DSCR binds first, meaning you may not actually get the LTV you're underwriting.
• Counting "other people's money" as risk-free. Just because you pulled your capital out doesn't mean the deal is free. You still own the debt and the operating risk.

Frequently Asked Questions