Fix and Flip ROI Calculator: How to Calculate Return on Investment

Fix and Flip ROI Calculator: How to Calculate Return on Investment

The difference between experienced fix-and-flip investors and beginners usually isn’t deal sourcing or renovation skills — it’s the ability to accurately project returns before committing capital. Understanding how to calculate ROI on a flip is the most fundamental skill in real estate investing, and getting it wrong by even a few percentage points can turn a profitable project into a loss. Here’s how the math actually works, followed by how LYNK Mortgage’s Fix-and-Flip ROI Calculator automates the process.

The Fix and Flip ROI Formula

Fix-and-flip ROI measures your net profit as a percentage of your total cash invested. The formula is straightforward:

ROI = (Net Profit / Total Cash Invested) x 100

Where Net Profit = Sale Price - Purchase Price - Renovation Costs - Financing Costs - Holding Costs - Selling Costs. And Total Cash Invested = your down payment plus any out-of-pocket renovation costs, closing costs, and holding costs not covered by the loan.

Worked Example: A Typical Fix and Flip

Here’s a real-world example showing how the numbers flow on a typical project:

Acquisition: Purchase price $180,000. Closing costs (title, appraisal, inspections) $3,500.

Financing: Fix-and-flip loan at 90% LTC. Loan amount: $202,500 (covers $162,000 of purchase + $40,500 of $45,000 rehab budget). Down payment / cash to close: $21,500. Interest rate: 9.0%. Origination: 2 points ($4,050). Monthly interest: $1,519.

Renovation: Total rehab budget $45,000 ($4,500 out of pocket beyond loan coverage). Timeline: 3 months.

Holding costs (5 months total — 3 months rehab + 2 months on market): Loan interest $7,594. Property taxes $1,042. Insurance $625. Utilities $500. Total holding: $9,761.

Sale: Sale price $295,000. Agent commissions at 5%: $14,750. Seller closing costs: $5,900. Net proceeds: $274,350.

Profit calculation: Net proceeds ($274,350) minus loan payoff ($202,500) minus origination ($4,050) minus holding costs ($9,761) minus out-of-pocket rehab ($4,500) minus acquisition closing costs ($3,500) = Net profit: $50,039.

Total cash invested: Down payment ($21,500) + closing costs ($3,500) + out-of-pocket rehab ($4,500) + holding costs ($9,761) = $39,261.

ROI: $50,039 / $39,261 = 127% return on cash invested in 5 months.

The Costs Most Investors Underestimate

The biggest margin killers in fix-and-flip investing aren’t the obvious ones — they’re the costs that new investors forget to include in their projections:

How the Calculator Helps You Evaluate Deals Faster

Running these numbers manually for every potential deal is time-consuming and error-prone. LYNK Mortgage’s Fix-and-Flip ROI Calculator automates the entire projection by letting you input purchase price, renovation costs, loan terms (LTC, LTV, interest rate, points), holding period, and expected sale price. It instantly outputs your projected net profit, ROI percentage, and cash-on-cash return — so you can evaluate whether a deal meets your minimum return threshold before you make an offer.

Use it to compare financing scenarios (what happens to your ROI if you put 10% down vs. 20%?), stress-test your assumptions (what if the project takes 7 months instead of 5?), and set your maximum purchase price based on your target return. Most experienced investors won’t pursue a flip unless the projected ROI exceeds 15-20% — the calculator tells you instantly whether a deal clears that bar.

Beyond ROI: Cash-on-Cash Return and Annualized Return

ROI tells you how much profit you made relative to your cash invested, but it doesn’t account for time. A 50% ROI over 4 months is far more valuable than a 50% ROI over 12 months, because you can redeploy that capital into your next deal sooner. Annualized return normalizes for time: a 50% ROI over 5 months annualizes to roughly 120%, while the same return over 12 months is simply 50% annualized. When comparing two potential deals, always factor in the hold time — a smaller percentage return on a faster flip often beats a larger return on a project that takes twice as long.