Duplex vs Triplex for House Hacking: Real Numbers, Real Tradeoffs

You've decided to house hack. Good call. The question now: duplex or triplex?

Both qualify for an FHA loan at 3.5% down. Both let you live in one unit and rent the rest. The financing is identical. But the cash flow, management load, and vacancy math are not. And that difference can swing your housing cost by $400 or more per month.

Here's what the numbers actually look like — and what nobody tells you about living next to two tenants instead of one.

The Financing: Same Rules, Same Entry Point

FHA treats 2-unit and 3-unit properties the same for down payment. On a $340,000 duplex, you're putting down $11,900. On a $380,000 triplex, $13,300. The gap is the price difference, not the loan structure.

Both require 12 months of owner occupancy. Both let you count 75% of the other units' rent toward your qualifying income. Both charge MIP — 1.75% upfront, roughly 0.55% annually — until you refinance or hit 20% equity.

The one wrinkle: triplexes and fourplexes must pass the FHA self-sufficiency test. Gross rent × 75% has to cover the full PITIA (principal, interest, taxes, insurance, MIP). Duplexes are exempt. If a triplex fails that test — say, rents are soft in the neighborhood — you can't use FHA. You'd need conventional owner-occupied (15% down for 2–4 units) or a different property. We've seen solid triplexes in Cleveland and Indianapolis pass easily; softer markets like some rural Ohio towns can trip you up.

In practice, most triplexes in decent rental markets pass. But run the test before you fall in love with a listing. A $380,000 triplex with $3,200/month gross rent needs $2,400 to cover PITIA. If your PITI runs $3,070, it fails. That's a hard stop. Duplexes skip this entirely — no self-sufficiency test, no math to run. One less thing to worry about when you're already juggling inspections, appraisals, and closing paperwork.

Cash Flow: Where the Triplex Wins

Let's use real numbers from Columbus, Ohio — a market where both duplexes and triplexes trade actively.

Duplex: $340,000. You live in the 2-bed, rent the 1-bed at $1,800/month. PITI (including MIP): $2,500. Your housing cost: $700/month. You're subsidizing your own mortgage by seven hundred bucks. Compare that to a $1,400 one-bedroom apartment and you're still saving — but you're not living free.

Triplex: $380,000. You live in the 2-bed, rent two 1-beds at $1,050 and $1,100. PITI: $3,070. Rental income: $2,150. Your housing cost: $920/month. Same city, similar neighborhoods. You're paying $220 more per month than the duplex scenario.

Wait. That doesn't sound like the triplex winning.

It does when you move out.

At month 13, you rent your unit. Duplex: both units at $1,800 = $3,600 gross. Triplex: all three at $1,350, $1,050, $1,100 = $3,500 gross. Similar. But the duplex has two income streams. The triplex has three. Lose one tenant in a duplex and you've lost 50% of your rent. Lose one in a triplex and you've lost 33%. That vacancy rate cushion matters — especially in a market where turnover runs 2–4 weeks between tenants.

The real cash flow advantage shows up in the move-out math. Duplex: $3,600 gross, minus $2,500 PITI, minus 5% vacancy ($180), minus 10% maintenance ($360) = $560/month net. Triplex: $3,500 gross, minus $3,070 PITI, minus 5% vacancy ($175), minus 10% maintenance ($350) = −$95/month. The triplex barely breaks even on paper.

So where's the win? Equity velocity. You're building principal paydown on a $380,000 asset, not a $340,000 one. Depreciation deductions scale with the higher basis. And in 5 years at 3% appreciation, the triplex is worth $440,000. The duplex: $394,000. That's a $46,000 spread on a $1,900 difference in down payment. The triplex amplifies your leverage.

Management: Two Tenants vs Three

Here's the part the spreadsheets skip. A duplex means one tenant relationship. One lease renewal per year. One middle-of-the-night toilet clog. One person to coordinate when the shared water heater dies.

A triplex means two. Or, if you're living in one unit, two tenant relationships plus your own. That's two lease expirations that might land in the same month. Two sets of move-in/move-out coordination. Two people who might not like each other (shared walls, shared driveway, shared trash day).

It's not twice the work — it's more like 1.5x. But the emotional load is real. You're not just a landlord. You're a neighbor. And when one tenant plays music at 2 AM and the other bangs on your door to complain, you're the referee.

The upside: you learn faster. Two tenant cycles in year one teach you screening, lease language, and turnover costs in a way one tenant doesn't. By the time you move out and buy property #2, you've already handled the hardest parts of small multifamily management.

The Numbers Side by Side

That 50% vs 33% vacancy hit is the silent differentiator. In a duplex, one empty unit craters your income. In a triplex, you've got two others carrying the load. Budget 5–8% vacancy and the triplex structure absorbs it better.

Who Should Choose Which

Pick the duplex if: You want the simplest possible house hack. One tenant, one lease, one relationship to manage. You're okay subsidizing $500–800/month for 12 months because the learning curve matters more than the extra margin. You'd rather have a lower PITI and sleep well than squeeze another $100 in rent from a third unit. Duplexes also tend to resell faster — the buyer pool for a 2-unit is larger than for a 3-unit. If you think you might need to exit in 3–5 years, that liquidity matters.

Pick the triplex if: You want to maximize rent coverage from day one. You're comfortable with more management — two tenants, two lease cycles, more coordination. You like the vacancy cushion. And you're willing to run the self-sufficiency test and walk away if the property doesn't pass. Triplexes are rarer than duplexes in most markets, which can mean less competition when you're buying — and more scarcity when you're selling. But the pool of buyers who want three units is smaller. Plan to hold longer.

The Break-Even Occupancy Check

Before you offer on either, run the break-even occupancy number. PITI divided by gross potential rent. That tells you what occupancy level you need just to cover costs.

Duplex at $2,500 PITI and $3,600 gross rent: $2,500 / $3,600 = 69.4%. You could lose 30% of your rent and still cover the mortgage. Comfortable.

Triplex at $3,070 PITI and $3,500 gross rent: $3,070 / $3,500 = 87.7%. You need 88% occupancy to break even. One unit vacant for a month and you're covering the gap out of pocket. That's the tradeoff — the triplex has more income streams, but the margin is tighter. In a market with 5–8% typical vacancy, 87.7% break-even is workable. In a softer market, it's risky.

Both work. The house hacking guide walks through the full strategy — financing, deal analysis, and the move-out playbook. The difference is fit. Duplex: simpler. Triplex: more income, more moving parts.

Run your own numbers. Then pick the one that matches your tolerance for tenant management and your target cash flow. There's no wrong answer — only the right fit for your situation.