Multifamily Investment Analysis Doesn’t Need to be Complicated
You can find plenty of websites that explain creative financing, sub-to deals, investing with zero money down, and all that. It’ll usually come with no concrete examples and hundreds of dollars worth of courses. This is not for those types of investors. This is for owners, brokers, and operators who want to truly understand the value of a multifamily deal, know how much debt it can cover, and actually get to the closing table. Underwriting deals and analyzing investment performance is a relatively simple endeavor. So, let’s get into the levers that banks and experienced dealmakers actually care about.
Potential Gross Income (PGI)
Potential Gross Income is the maximum rent a property could generate if every unit were occupied at full rent with no economic vacancy. It reflects unit count, unit mix, and assumed market rents. In a perfect world, 100 units x $2,000 per unit per month x 100% occupancy x 12 months = $2,400,000 annual potential gross income.
PGI is a ceiling, not an expectation of revenue.
Overstated market rents, or aggressive post-renovation assumptions, can inflate PGI early and make everything downstream look better than it should. PGI should be conservative, boring, and easy to defend. It is the starting point to calculate the next important metric: Effective Gross Income.
Effective Gross Income (EGI)
Effective Gross Income adjusts PGI for vacancy, credit loss, concessions, and loss to lease.
EGI matters more than many investors realize because it captures the full picture of the income-producing aspect of an investment. Problems with the EGI means an underlying issue with the property or its operations, not simply high expenses (because we haven’t accounted for operating expenses yet). Once opex is deducted from EGI, the output is the Net Operating Income.
Net Operating Income (NOI)
Net Operating Income is what remains after normal operating expenses are paid, before debt service and capital events. NOI supports debt, determines valuation, and ultimately funds investor returns. It is the most important key perin multifamily underwriting, and the one most often misrepresented and misunderstood.
The NOI of a property can be determined many different methods. When underwriting potential multifamily acquisitions and investments, it’s important to understand which NOI you’re looking at and verify its authenticity.
T-12 — This is the net operating income for the prior 12 months. It is the most true indicator of current, in-place asset performance.
T-6 Annualized, T-3 Annualized, and even T-1 Annualized — Similar to T-12, but annualized based on a shorter time horizon. There are legitimate reasons to do this, but be sure you understand the full picture and how the months before the annualized period performed.
Forward 12 Months — This is the industry standard NOI horizon for multifamily investing. However, rental growth is not guaranteed. Make sure you know what growth assumptions are being used and verify the accuracy for the property’s submarket.
Acquisition Cap Rate — Also known as the “going-in” or “purchase” cap rate. Many owners of multifamily properties will say that this cap rate cannot be known until after the purchase. There’s some truth to that. Thorough due diligence will get you as close as possible to the true acquisition cap rate, but be sure you’re covered on potential blind spots.
The danger with NOI is its sensitivity to operations. If property taxes or insurance swing bigger than expected, it’ll materially impact the NOI. Staff turnover, renovations, even adjustments to late fees can all move the needle.
Levered vs. Unlevered IRR
For many casual and experienced investors alike, the Levered IRR is the most important metric when evaluating investment performance. Why? Because it factors in time and leverage. Very briefly:
Levered IRR takes into account all cash inflows and outflows, using equity contributions as the basis for calculating the internal rate of return. It shows what equity earns after financing effects. The difference between levered and unlevered IRR tells you how much of the return comes from leverage rather than operations.
Unlevered IRR reflects the performance of the property itself, independent of financing. It tells you what the asset earns based on operations and exit assumptions alone.
When the spread between levered IRR and unlevered IRR is wide, debt is doing much of the work. This means your upside and downside exposure is magnified… an underlying feature of financial leverage across all investment types.
For apples-to-apples comparisons, Unlevered IRR is the better choice when evaluating different investment opportunities. Levered IRR is deal-specific, and highly sensitive to the lender’s terms.
Debt Service Coverage Ratio (DSCR)
DSCR is a stress test. It measures how comfortably a property’s NOI covers its debt service. The formula is simple NOI / Annual Debt Service = DSCR. Lenders focus on it because it answers a simple question: can this investment property pay its mortgage? Traditional banks want to see a minimum DSCR between 1.20x and 1.35x coverage. However, this is subject to the property type, physical and economic condition (stabilized vs. value add), market factors, and even the borrower’s negotiating abilities.
Most lenders will include covenants to reassess a property’s coverage ratio and ensure ongoing compliance. Coverage that looks adequate in year one can deteriorate as expenses rise or rent growth slows. This is why it’s critical to not only operate the property effectively, but to understand those boring lender requirements when securing financing.
Our DSCR Calculator can give you a quick sanity-check regarding potential debt arrangements.
Equity Multiple
Equity multiple answers a blunt question: how many dollars come back for each dollar invested. Unlike IRR, equity multiple does not hide leverage or the time value of money. A 2.0x multiple means you doubled your money, regardless of how long it took. Equity multiple is a blunt metric on its own, but is particularly useful when used in tandem with IRR.
Keep in mind the importance of the investment hold period when looking at outputs. A strong equity multiple can exist with a modest or low IRR if there’s a long investment horizon or delayed cash inflows (likely due to a significant cash-out event at disposition). Likewise, a quick flip of a property can generate impressive internal rates of return, but be underwhelming from an equity multiple perspective.
The Point of Cash Flow Analysis
If a deal still works once these outputs are understood and stress-tested, it may be worth pursuing. If it doesn’t, the analysis has already done its job, and it’s time to move on.
If you want to run own scenarios instead of outsourcing it, that’s where the analysis model is great for a gut-check. You can run unlimited scenarios in just a few minutes each—no finance or Excel background required. It costs less than hiring an analyst, gig worker, or consultant, and it gives you the power back.
And it’s not just cost. This simple model will save you hundreds of hours on coursework, degrees, certificate programs, and YouTube guru tactics that go nowhere. Instead, you’ll have a tangible tool to evaluate deals. Go into negotiations, debt applications, and investor pitches with the confidence of knowledge.