IRR (Internal Rate of Return)

What Is IRR (Internal Rate of Return)?

IRR (internal rate of return) answers: "What annual return am I really earning when I account for when the money comes in?" Unlike cash-on-cash return or ROI, IRR folds in the timing of every dollar. A dollar in year one is worth more than a dollar in year ten. IRR captures that. You plug in your upfront cash, each year's net income, and your exit proceeds. Excel or a calculator solves for the rate that makes the whole stream worth zero today. Syndication sponsors love IRR because it lets them compare deals with different hold periods and leverage. For your own rentals, it's the metric that tells you whether a five-year hold beats a ten-year hold—or vice versa.

IRR is the annualized rate of return that makes the net present value of all cash flows—your initial investment, rental income, and sale proceeds—equal to zero.

At a Glance

What it is: The annualized return that makes the present value of all cash flows equal to zero.
Why it matters: Timing matters. IRR rewards faster paybacks and penalizes slow ones.
Typical range: Core assets 8–10%, value-add 12–18%, opportunistic 20%+.
Best use: Comparing deals with different hold periods, leverage, or payout schedules.

Formula

0 = NPV = Σ [Cash Flow / (1 + IRR)^t] - Initial Investment

How It Works

The inputs. You need three things: your initial cash out (down payment, closing costs, immediate repairs—all negative), your annual net cash flow (rent minus expenses and debt service), and your exit year cash (sale proceeds minus selling costs minus loan payoff). That last year is usually the biggest number.

The math. IRR is the discount rate that makes the sum of all those cash flows, discounted back to today, equal zero. You don't solve it by hand. Excel's `=IRR()` function does it. So do most real estate calculators. The formula is iterative—the software tries rates until it finds the one that balances the equation.

Why timing matters. A property that pays $5,000/year for five years and sells for $100,000 has a different IRR than one that pays nothing for four years and then sells for $125,000. Same total dollars, different timing. IRR reflects that. A higher IRR means your money is working harder because it's coming back sooner or growing faster.

Real-World Example

Marcus: Two deals, same total profit, different IRRs.

Marcus compares a Memphis duplex (hold five years, $2,100/month net, sell for $340,000) with a Phoenix fourplex (hold ten years, $1,800/month net, sell for $520,000). Both require $85,000 down. The fourplex has higher total profit over ten years. But the duplex's IRR comes in at 18% because he gets his money back faster. The fourplex clocks 11%. Marcus chooses the duplex—he wants capital recycled sooner for his next 1031 exchange. IRR made the trade-off visible.

Pros & Cons

Advantages

Captures timing—early cash flows count more than late ones.
Lets you compare deals with different hold periods and leverage.
Standard in syndication and institutional investing.
One number that folds in income and appreciation.

Drawbacks

Sensitive to exit assumptions—change the sale price or cap rate, IRR swings.
Doesn't show absolute dollars—a 15% IRR on $20,000 is less money than 12% on $200,000.
Requires a projected exit; long holds make the number speculative.
Can be gamed with aggressive sale projections.

Watch Out

Modeling risk: IRR loves leverage and short holds. Sponsors can juice it with optimistic exit cap rates. Stress-test: what happens if you sell at a 6.5% cap instead of 5.5%?
Reinvestment assumption: IRR assumes you reinvest interim cash flows at the same rate. In practice, you might park money at 4%. That can overstate returns.
Execution risk: A delayed sale or a rent dip in year two changes the whole curve. IRR is a projection, not a guarantee.
Comparison trap: Don't compare IRR across asset classes without adjusting for risk. A 20% IRR on a ground-up development isn't the same as 20% on a stabilized apartment.

Ask an Investor

The Takeaway

IRR is the metric that respects time. When you're choosing between a quick flip and a long hold, or comparing syndication deals with different waterfalls, IRR levels the field. Use it. But don't trust it blindly—run sensitivity on the exit. A sponsor's 18% IRR can drop to 12% if the exit cap rate moves one point. Know your downside before you commit.