How refinancing changes the denominator
Cash-on-cash return is annual pre-tax cash flow divided by total cash invested. When you refinance and pull equity out, the proceeds reduce your net cash invested in the property. If you originally put $80,000 down and later pull $50,000 out through a cash-out refinance, your effective cash invested in this property drops to $30,000.
A smaller denominator means the same cash flow produces a higher cash-on-cash return — mathematically. This is the logic behind the BRRRR strategy (Buy, Rehab, Rent, Refinance, Repeat): if you can refinance out most or all of your original investment while maintaining positive cash flow, your cash-on-cash return on the remaining invested cash rises dramatically.
How refinancing changes the numerator
The problem: a larger mortgage loan usually means higher monthly debt service — higher principal and interest payments that reduce your annual cash flow. The refinanced loan may be at a higher interest rate than your original mortgage, or on a shorter amortization, or both. Cash flow (the numerator) shrinks as debt service rises.
Example: A property generates $12,000/year in cash flow with $1,500/month in debt service. You cash-out refinance at a higher rate, raising debt service to $2,000/month — adding $6,000 in annual payments. Cash flow drops to $6,000. Your cash-on-cash return on the $30,000 remaining invested is 20% ($6,000 ÷ $30,000) — higher than the original 15% ($12,000 ÷ $80,000), but cash flow itself is lower.
Modeling the real tradeoff: where the cash goes
The key question in any cash-out refinance decision is: what do you do with the pulled-out equity? If the proceeds sit in a bank account earning 4% and your rental now earns 20% cash-on-cash, that looks like a win on the property. But the full picture compares the net return on the redeployed capital (new property, other investments) against the marginal cost of borrowing (the refinance rate).
Tax implications also matter: refinance proceeds are not taxable income (a loan is not income), but the higher interest payments are deductible. The original equity you pulled out had accumulated without being taxed — you only defer (not eliminate) recapture on that equity until you eventually sell. Run the cash-on-cash numbers on all deployed capital together, not just the refinanced property in isolation.
Frequently asked questions
Does a cash-out refinance improve cash-on-cash return?
Sometimes. It reduces cash invested (the denominator) but also reduces cash flow through higher debt service (the numerator). The net effect depends on the new loan terms and where you redeploy the cash.
Are cash-out refinance proceeds taxable?
No. Loan proceeds are not income. However, the higher interest payments are deductible as a rental expense, which partially offsets the higher debt service.
How does BRRRR use cash-out refinancing?
BRRRR investors buy, renovate, rent, then refinance to pull most of the original investment back out — ideally leaving little or no original cash invested, making the cash-on-cash return very high on the remaining equity.
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.