Why It Matters
Going-In Cap Rate = Year 1 NOI / Purchase Price × 100
If a duplex produces $18,000 in annual NOI and you pay $250,000, the going-in cap rate is 7.2%. That single number summarizes the income return baked into the acquisition price the day you close.
At a Glance
- Snapshot metric: reflects day-one income yield, not future potential
- Excludes debt service — NOI is used before mortgage payments
- Higher going-in cap rate generally means more income relative to price
- Compared against local market cap rates to judge whether a deal is priced fairly
- Different from exit cap rate, which is projected at the time of sale
- Useful for ranking multiple acquisition candidates on the same scale
Going-In Cap Rate = Year 1 NOI / Purchase Price × 100
How It Works
The going-in cap rate has two inputs: Year 1 NOI and purchase price.
Year 1 NOI is gross rental income minus all operating expenses — property taxes, insurance, property management, maintenance, and reserves. It excludes mortgage payments and capital expenditures for major renovations.
Purchase price is the agreed acquisition cost, not including closing costs or planned rehab spend. Some analysts use "all-in cost" (purchase plus immediate capex) as the denominator instead, producing what is sometimes called the stabilized going-in cap rate. Both approaches are valid; the key is using the same definition when comparing properties.
The formula is:
Going-In Cap Rate = (Year 1 NOI ÷ Purchase Price) × 100
Once you have the going-in cap rate, you compare it to the prevailing market cap rate for similar assets in the same submarket. If comparable properties trade at a 6.5% cap and you are acquiring at a 7.8% cap, you are buying above-market yield — either because the seller is motivated, the property has deferred maintenance, or you found a genuinely underpriced asset. If you are acquiring below the market cap rate, you need a clear value-add thesis to justify the premium.
The going-in cap rate is also the starting point for value-add underwriting. Investors track how it evolves into the stabilized cap rate (after improvements) and the exit cap rate (at disposition). The spread between going-in and exit cap rates drives much of the return math in syndication and fund models.
Because the metric excludes financing, two investors looking at the same deal — one paying cash and one using leverage — see identical going-in cap rates. This makes it a clean, apples-to-apples metric for comparing acquisition opportunities regardless of capital structure.
Real-World Example
DeShawn is evaluating a 12-unit apartment building asking $1,200,000. His cash-flow analysis shows annual gross rents of $144,000. After running a thorough expense analysis, he identifies $54,000 in operating costs — property taxes, insurance, management fees, maintenance, and vacancy reserves. That leaves Year 1 NOI of $90,000.
Going-In Cap Rate = $90,000 ÷ $1,200,000 × 100 = 7.5%
His revenue analysis of comparable properties shows the submarket trades at 6.8% to 7.2%. At 7.5%, he is acquiring at a premium yield — roughly 30 to 70 basis points above market.
DeShawn's rehab analysis identifies $80,000 in deferred maintenance suppressing rents below market. After repairs, rents should rise to $158,000 gross, pushing stabilized NOI above $100,000. His financing analysis confirms the deal still cash flows positively at the target leverage. He proceeds, knowing the 7.5% going-in cap rate already justifies the acquisition even before the value-add upside is realized.
Pros & Cons
- Simple and fast — two inputs, one percentage, immediate comparability
- Financing-agnostic — allows fair comparison across all-cash and leveraged buyers
- Universal benchmark — market cap rates are publicly tracked, making pricing context easy to find
- Starting point for deeper analysis — going-in cap rate anchors the full investment return model
- Helps filter deals quickly — anything below your minimum threshold gets cut before deeper diligence
- Ignores financing — a 7% cap rate with expensive debt can still produce negative cash flow
- Depends entirely on accurate NOI — inflated revenue assumptions or understated expenses distort the metric
- No renovation costs in denominator — buying a distressed asset at a "high" going-in cap rate can be misleading if rehab spend is large
- Point-in-time only — says nothing about rent growth, expense inflation, or exit value
- Not useful for development or raw land — there is no Year 1 income to measure
Watch Out
Seller pro formas inflate NOI. Always rebuild NOI from actual rent rolls and trailing operating statements, not marketing projections. A 100-basis-point difference in NOI can swing the going-in cap rate by enough to make a bad deal look good.
Market cap rates shift with interest rates. In a rising rate environment, cap rates expand — meaning property values fall for the same NOI. A going-in cap rate that looks attractive today may look thin if you need to exit in two years into a higher-rate market.
The denominator matters. Some brokers use purchase price; others use all-in cost including closing costs and immediate capex. Make sure you are consistent when comparing deals or benchmarking against market data.
Low going-in cap rates are not automatic disqualifiers. In high-barrier markets, a 4.5% going-in cap rate may be standard. Context matters more than the absolute number.
The Takeaway
The going-in cap rate is the entry ticket price for any income-producing property acquisition. It tells you how much yield you are buying before leverage, improvements, or market movements change the picture. Used correctly — with accurate NOI, consistent denominator definitions, and local market context — it is one of the most reliable quick filters in real estate investing. Use it to screen deals fast, benchmark against market rates, and anchor your full underwriting model.