Cash-Out Refinance Leverage Calculator: Buy, Invest, or Hold

You own a rental with real equity sitting in it. A cash-out refinance can turn that equity into cash today — but the question that matters isn't "can I pull the cash out," it's "what do I do with it once I have it." Buy a second rental? Put it in the market? Or leave the original loan alone? Each answer moves your monthly cash flow, your leverage, and your net worth five years out — usually by more than people expect.

This post walks through cash-out refinance mechanics, the three strategies the free Leverage Calculator compares side by side, and — using the calculator's own defaults as a worked example — an honest look at where leverage helps and where it quietly wrecks your cash flow.

What a Cash-Out Refinance Actually Does

A cash-out refinance replaces your existing mortgage with a new, larger loan on the same property, and you pocket the difference in cash at closing. Three moving parts:

• New loan amount = remaining principal on your old loan + the cash you want out. Owe $300,000, want $200,000 out, your new loan is $500,000.
• Closing costs come off the top — typically a few thousand dollars in origination, appraisal, and title fees. Net cash in hand is the cash-out amount minus closing costs, not the gross figure lenders advertise.
• New payment is calculated on the entire new balance, at whatever rate the new loan carries — not just the amount you're taking out. Refinancing to pull out $200,000 doesn't just add a $200,000 payment; it re-prices the whole existing balance at the new rate too.

If your current rate is well below today's rates, that repricing can cost more than the cash-out is worth — the single biggest number to check before refinancing anything, and exactly what the calculator forces you to look at instead of a lender quote burying it.

The Three Strategies the Calculator Compares

The Leverage Calculator runs the same underlying property through three parallel scenarios and ranks them by 5-year net worth:

1. Status Quo — do nothing. Keep the existing loan, keep collecting rent, let the property appreciate and the balance amortize down on its own.
2. Refi + Buy — cash-out refinance, then use that cash as the down payment on a second rental. You now hold two mortgages and two rent rolls.
3. Refi + Invest — cash-out refinance, but put the net cash into the market at an assumed average annual return (default 8%, roughly the long-run S&P 500 average — change it to your own assumption).

Each is a genuinely different leverage decision: Status Quo keeps debt flat, Refi + Buy compounds it into a second asset, Refi + Invest trades real estate leverage for market leverage. None is "correct" — they trade monthly cash flow against long-run net worth differently, which the next section shows with real numbers.

The Metrics It Outputs, and What They Actually Mean

Each strategy card reports the same six numbers, so you can compare like-for-like:

• Monthly P&I — the new principal-and-interest payment(s). For Refi + Buy this is two payments added together.
• Monthly cash flow — rent minus expenses minus P&I, combined across every property in that strategy.
• Cash-on-cash return — annual cash flow divided by cash invested. The "invested" base differs per strategy: for Refi + Buy it's the new property's down payment plus closing costs; for Refi + Invest it's just the refinance closing costs, since the cash-out amount is redeployed rather than spent. Don't eyeball-compare the two without checking which base each one uses.
• Break-even months — how long until cash flow recovers what Status Quo would have delivered. Shows "n/a" when a strategy never catches up.
• Leverage ratio — total debt divided by total property value.
• 5-year net worth — appreciation-driven equity (3.5%/year default) plus, for Refi + Invest, the compounded value of the invested cash. What the calculator ranks strategies by.

Why Leverage Cuts Both Ways: A Worked Example

Run the calculator's own default inputs — $800,000 property, $300,000 remaining loan at 4.5%, $3,500 rent, $1,200 expenses, a $200,000 cash-out refinanced at 7.25%, and a $600,000 second property financed with 25% down at 7.5% — and you get a result that's more honest than most refi pitches:

Refi + Buy wins on 5-year net worth — but only by way of a combined negative monthly cash flow of over $2,300, because the 4.5% original loan gets replaced with a 7.25% loan and the new property adds a 7.5% loan on top. That's not an edge case; it's what happens any time you refinance out of an old low rate to fund a new purchase. The extra equity from owning two appreciating properties is real, but you finance your way to it with money leaving your pocket every month, through every vacancy, rate move, and repair bill between now and year five.

Refi + Invest, by contrast, comes out almost cash-flow-neutral (+$170/month) and lands within 1% of Refi + Buy's net worth — no second mortgage, no second tenant, nothing to manage. The real lesson: more debt can produce a higher net-worth number on paper while making your actual monthly position measurably worse. The "winning" strategy on a spreadsheet isn't automatically the one that survives a bad year, and this doesn't yet account for vacancy, post-closing rate changes, or the market's assumed 8% return actually showing up.

The mechanism generalizes. Vacancy risk compounds with leverage — a vacant month is a rounding error unleveraged, but a payment you still owe once you're carrying two mortgages. Rate risk doesn't stop at closing — the calculator prices one fixed rate per loan, but a future refinance happens at an unknown rate. Transaction costs are asymmetric — closing costs are modeled, but a future sale's commissions aren't, which matters when strategies land within 1% of each other. And appreciation is an assumption, not a fact: run the scenario at 0% and see how much of Refi + Buy's edge survives. This is a math tool, not investment advice — it shows the arithmetic consequence of assumptions you control, not your local market or your tenant's plans.

How to Use the Leverage Calculator

1. Open the Leverage Calculator. Nothing you enter leaves your browser.
2. Fill in "Existing Property" — market value, remaining loan balance, current rate, monthly rent, and expenses (fold vacancy and taxes into expenses).
3. Fill in "Cash-Out Refinance" — cash you want out, new rate, term, and closing costs. Watch "net cash after closing" update live.
4. Fill in "New Property" — purchase price, down payment %, rate, term, rent, and expenses for the property you'd buy with the proceeds (only matters for Refi + Buy).
5. Set the market assumption — expected average annual return if you invested the cash instead (only matters for Refi + Invest).
6. Read all three cards. The trophy icon marks whichever strategy currently ranks highest on 5-year net worth — but check monthly cash flow and leverage ratio too, since the "winner" isn't always the one you can live with month to month.
7. Stress-test it. Bump rates up a point, drop appreciation to 2%, and watch which strategy wins change.

Honest Comparison: Other Cash-Out Refi and BRRRR Calculators

• BiggerPockets-style BRRRR calculators (We Are Calculator's BRRRR Calculator, Ridge Street Capital's BRRRR Calculator, DealCheck) — built for a different question: whether a buy-rehab-rent-refinance deal fully recycles your capital. Deeper on rehab-phase math, but they don't compare refi-and-buy against refi-and-invest-in-the-market.
• Bank refinance calculators (Bank of America, Rocket Mortgage, most lenders) — good for your specific new payment, but built around a rate-quote funnel. Most don't model what you'd do with the cash afterward.
• Generic cash-on-cash / ROI calculators — fine for the formula alone, but single-scenario. You'd run the numbers three times by hand to reproduce what this tool shows on one screen.

None are wrong for what they're built for. The gap this tool fills is the decision — keep, buy again, or invest — as three comparable outcomes instead of three calculators you reconcile yourself.

FAQ

Does a cash-out refinance change the rate on my whole loan, or just the cash-out portion?

Your whole loan. A cash-out refi replaces the entire mortgage with one new loan at one new rate — if your current rate is well below the new one, you're repricing your full existing balance, not just the amount you're pulling out. Usually the biggest hidden cost in a cash-out refi.

What's a realistic assumption for property appreciation?

The calculator defaults to 3.5%/year, a common long-run planning figure for US residential real estate, but actual appreciation varies by market and can be negative for stretches. Run the numbers at 0% and see whether the strategy you like still wins.

Is Refi + Buy always better than Refi + Invest, since real estate has extra leverage?

No — in the calculator's default scenario they land within about 1% of each other on 5-year net worth, and Refi + Buy gets there with materially worse monthly cash flow and a second property to manage. Which is "better" depends on your appetite for negative cash flow and hands-on management, not just the net-worth number.

How is cash-on-cash return calculated differently between the strategies?

For Refi + Buy, it's annual cash flow divided by the new property's down payment plus closing costs. For Refi + Invest, it's annual cash flow divided by just the refinance closing costs, since the cash-out amount is redeployed rather than spent. Not directly comparable without accounting for that denominator difference.

Does the calculator account for taxes?

No. Depreciation, capital gains, and mortgage interest deductibility aren't modeled. Output is pre-tax cash flow and net worth — useful for comparing strategies against each other, not for filing purposes.

Is my financial data uploaded anywhere?

No. All the math runs client-side in plain JavaScript. Nothing you type is sent to a server or stored — close the tab and it's gone.

For the amortization math underneath any of these loans, see how mortgage payments are calculated. If you're deciding between a cash-out refinance and a HELOC for pulling equity out in the first place, how HELOC payments work covers the structural tradeoffs. For the rest of orangebot's free, browser-only finance and utility tools, see /tools.