Rental property is not passive income. It is a small business with a mortgage attached, and in 2026 the arithmetic is tighter than it was five years ago. Financing costs more, insurance costs substantially more, and property taxes have risen with assessments.
That doesn’t make it a bad business. It makes underwriting the difference between a good deal and an expensive lesson.
Financing an investment property
Investment property loans are priced and underwritten more conservatively than primary residences:
| Typical requirement | |
|---|---|
| Down payment | 20%–25% (15% possible on some single-unit conventional loans) |
| Rate premium vs primary residence | ~0.5%–0.875% higher |
| Credit score | 680+ typically, 740+ for best pricing |
| Cash reserves | Often 6 months of payments per property |
DSCR loans have become the dominant route for investors buying multiple properties. Instead of qualifying on your personal income and DTI, the lender qualifies the property: does projected rent cover the debt service at their required ratio (commonly 1.0 to 1.25)?
The trade-off is a higher rate and usually 20%–25% down. The advantage is that your personal DTI stops being the constraint, which matters enormously once you own three or four properties and conventional underwriting stalls.
House hacking remains the cheapest entry: buy a two-to-four unit property, live in one unit, and finance it as a primary residence — 3.5% down with FHA, 0% with VA. You get owner-occupant financing terms on a property that generates rental income. The constraint is that you have to live there, typically for at least a year.
The screening rules — and their limits
The 1% rule: monthly rent should be at least 1% of purchase price. A $250,000 property should rent for $2,500.
The 50% rule: operating expenses (excluding mortgage) will consume roughly half of gross rent over time.
Both are triage tools, not analysis. In 2026 very few properties in appreciating metros meet the 1% rule, and applying it rigidly would exclude most of the country. Use these to decide what to underwrite properly, then underwrite properly.
The numbers that actually matter
Cap rate = Net Operating Income ÷ purchase price. NOI excludes financing, so cap rate compares properties independent of how you paid for them. Useful for comparing markets.
Cash-on-cash return = annual pre-tax cash flow ÷ total cash invested. This is the number that tells you what your money is doing.
Total return combines cash flow, principal paydown by tenants, appreciation, and tax benefits including depreciation. Cash flow alone understates rental returns — but it is the only component that pays bills while you wait.
Worked example — $300,000 single-family rental
| Item | Amount |
|---|---|
| Purchase price | $300,000 |
| Down payment (25%) | $75,000 |
| Closing costs + initial repairs | ~$12,000 |
| Total cash invested | ~$87,000 |
| Gross annual rent ($2,400/mo) | $28,800 |
| Vacancy allowance (7%) | −$2,016 |
| Property taxes (1.1%) | −$3,300 |
| Insurance | −$2,400 |
| Maintenance (8% of rent) | −$2,304 |
| CapEx reserve (8% of rent) | −$2,304 |
| Property management (9%) | −$2,592 |
| Net operating income | $13,884 |
| Mortgage P&I ($225,000 @ 7.2%, 30yr) | −$18,336 |
| Annual cash flow | −$4,452 |
Cap rate is 4.6% — respectable. Cash flow is negative $371 a month.
That is not a rigged example; it is the standard outcome in many markets at 2026 rates and prices. The deal only works if you buy below market, add value, put more money down, buy in a higher-yield market, or accept negative cash flow as the price of appreciation and principal paydown. Any of those can be a deliberate strategy. None of them should be a surprise discovered in month three.
Expenses new investors leave out
- CapEx reserves. Roofs, HVAC, water heaters, flooring. These don’t hit monthly, but they hit. Budget 5%–10% of rent.
- Vacancy. Even good properties turn over. 5%–8% annually is realistic.
- Property management. 8%–10% of rent. If you self-manage, you are paying yourself in labor — include it anyway so the numbers survive you hiring out later.
- Tenant turnover costs. Paint, cleaning, listing, lost rent between tenants — often $1,500–$3,000 per turnover.
- Insurance for landlords — a landlord policy (DP-3) costs more than a homeowner policy and is not optional.
- Rising property taxes. Many jurisdictions reassess on sale. Your tax bill may be materially higher than the seller’s.
Tax treatment worth understanding
Rental property carries real tax advantages: depreciation of the structure over 27.5 years shelters income, and operating expenses, mortgage interest, insurance and management fees are deductible.
Two complications. Passive activity loss rules limit how much rental loss can offset ordinary income for most investors. And depreciation recapture means that shelter is partly deferred, not free — it gets settled when you sell, unless you use a 1031 exchange.
Frequently asked questions
How much do I need to start? For a $300,000 rental at 25% down, roughly $87,000 including closing costs and reserves. House hacking with FHA can reduce that to under $20,000 on a similar property.
Is negative cash flow ever acceptable? It can be a deliberate bet on appreciation and principal paydown, but only if you have income to sustain it indefinitely. It is not acceptable as an accident.
Should I use an LLC? LLCs offer liability separation but complicate financing — many residential lenders won’t lend to an LLC, and transferring a mortgaged property can trigger a due-on-sale clause. Discuss with an attorney before buying, not after.
Short-term or long-term rental? Short-term rentals can produce higher gross yields but carry higher costs, more labor, and significant regulatory risk — many cities have tightened rules sharply. Never underwrite a purchase on short-term rates unless the local ordinance is confirmed and stable.
How many properties until it replaces income? At $300/month of true cash flow per property, replacing a $60,000 salary takes roughly 17 properties. This is why most investors build wealth through equity and appreciation rather than cash flow alone.
Underwrite before you shop
Build the spreadsheet first. Put in real insurance quotes for the specific address, the reassessed tax figure rather than the seller’s, and honest reserves. Then look at properties that survive it.
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