Investment Property Loan Calculator: Payment on a Rental Mortgage
Work out the monthly payment and total interest on an investment property loan — the financing structure for a single-family or small multi-family rental, distinct from primary-residence mortgages and commercial loans.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year amortization schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Monthly payment | Total interest | Total of payments |
|---|---|---|---|
| $200k · 8.5% · 30-year | $1,537.83 | $353,617.71 | $553,617.71 |
| $120k · 9% · 25-year | $1,007.04 | $182,110.69 | $302,110.69 |
| $450k · 7.75% · 30-year (4-plex) | $3,223.86 | $710,587.84 | $1,160,587.84 |
| $80k · 10% · 20-year (DSCR) | $772.02 | $105,284.16 | $185,284.16 |
How This Calculator Works
Enter the loan amount (purchase price minus down payment), the APR, and the term. The calculator turns the APR into one constant monthly payment using the amortization formula and shows total interest paid across the loan. Investment property loans cost more than primary mortgages — factor the higher rate into rental cash flow projections.
The Formula
Fixed-Rate Amortization
P = loan amount, r = monthly rate (APR ÷ 12), n = number of monthly payments
Worked Example
A $200,000 investment property loan at 8.5% APR over 30 years gives a monthly payment of about $1,538. Total payments come to roughly $553,600 over 30 years — interest adds about $353,600. Against $24,000 of annual rent, that's $1,538/month of mortgage P&I against $2,000/month of rent — leaving $462/month for taxes, insurance, vacancy, maintenance, and cash flow.
Key Insight
Investment property loan cash flow has three drivers: the rent-mortgage gap, vacancy and maintenance reserves, and tax treatment. New investors routinely underestimate operating expenses — 'rent minus mortgage' looks positive but evaporates once 10% to 20% goes to vacancy, maintenance, management, taxes, and insurance. Pro forma the deal with realistic operating costs (often 30% to 50% of gross rent on residential rentals) before assuming the property cash flows.
Why investment properties cost more to finance
Investment property mortgage rates are typically 0.5-1.5 percentage points HIGHER than primary residence rates for the same borrower. Three factors drive this premium. (1) HIGHER DEFAULT RISK — borrowers prioritize protecting their primary residence; investment properties more likely to be defaulted if financial stress occurs. Industry research consistently confirms higher delinquency on investment property loans.
(2) PROPERTY MANAGEMENT RISK — investment properties depend on tenant occupancy and rent collection. Vacancy, maintenance issues, problem tenants can disrupt income. Primary residences have stable owner-occupant 'tenant' (the borrower themselves). (3) CONFORMING REQUIREMENTS — Fannie Mae and Freddie Mac apply higher down payment requirements (15% minimum for 1-unit; 25% for 2-4 unit) and stricter DSCR analysis. Some lenders price beyond conforming requirements.
Cash reserves required: typical conforming investment property loan requires 6 months PITI in reserves (vs 2 months for primary). For multiple investment properties: lenders may require 6 months PITI for EACH property held. This is one reason most U.S. small landlords own 1-3 properties — financing constraints make rapid portfolio expansion difficult without commercial / portfolio lending alternatives.
Tax benefits — depreciation as the hidden return
U.S. tax law allows residential rental property depreciation over 27.5 years (commercial over 39 years). For a $500K property with $400K depreciable basis (excluding land): annual depreciation $14,545. This is a NON-CASH expense that reduces taxable rental income but doesn't reduce cash flow. For 35% marginal bracket investor: $14,545 × 35% = $5,090 annual tax savings.
Combined with mortgage interest deduction (typically $15K-$30K annually in early years), most rental properties produce TAXABLE LOSSES in early years even while generating positive cash flow. These passive losses may: (a) offset other passive income, (b) offset up to $25K of active income if borrower's AGI <$100K (phase-out to $150K), (c) suspend until disposition. Passive loss rules under §469 are complex.
At sale, depreciation 'recapture' is taxed at up to 25% (vs 20% long-term capital gains for the appreciation portion). For a property depreciated $290K over 20 years: recapture tax $290K × 25% = $72,500. 1031 like-kind exchange can defer this; outright sale triggers it. The tax benefits of real estate ownership are substantial, but the realization tax at sale is significant. Professional tax planning essential for serious real estate investors.
Investment property loan typical terms (Fannie Mae 2024)
Reference investment property loan requirements and pricing.
| Property type | Min down payment | Max LTV | Rate premium vs primary |
|---|---|---|---|
| 1-unit single family rental | 15% | 85% | +0.5 to 1.0% |
| 2-unit duplex rental | 25% | 75% | +0.75 to 1.25% |
| 3-4 unit small multifamily | 25% | 75% | +1.0 to 1.5% |
| 1-unit purchase (cash-out refi) | 25% | 75% | +0.5 to 1.0% |
| 2-4 unit purchase (cash-out refi) | 30% | 70% | +0.75 to 1.25% |
| Investment property — second home rate | n/a (loophole closed) | n/a | Pre-2014 fraud common |
Higher LTV options exist for portfolio lenders and some DSCR loan programs, often at higher rates (~1-2% premium). DSCR loans qualify based on property cash flow rather than borrower income — useful for borrowers with high property income but irregular personal income (self-employed, retirees). Always shop multiple lenders; rate quotes for investment properties vary more than primary residence quotes.
Frequently Asked Questions
How does investment property financing differ from primary mortgage?
Higher rate (0.5 to 1.5 points above primary), higher down payment (20% to 25%+), stricter DTI underwriting, and rental income only partially counted (typically 75% of market rent). Property must be held as investment (not flipped) per most lender policies.
How much down payment is required?
Single-family investment: 20% minimum, often 25% for the best rates. Multi-family (2-4 units): 25% to 30%. Commercial (5+ units): 25% to 35% under commercial loan rules. Higher leverage available through DSCR and non-QM products at higher rates.
What is a DSCR loan?
Debt Service Coverage Ratio loan — qualifies the borrower based on the property's rental income covering debt service (typically 1.0 to 1.25x), without traditional income documentation. Higher rate than conventional (often 1 to 3 points more), faster underwriting, no personal DTI test.
Are mortgage interest payments deductible?
Yes — investment property mortgage interest is deductible against rental income on Schedule E. Unlike primary-home mortgage interest (which faces the standard-deduction hurdle for itemization), Schedule E deductions reduce rental income directly.
Can I use a primary mortgage for a rental?
Only if you actually occupy the property as a primary residence for the required period (usually 1 year minimum). Buying a rental and disguising it as primary residence is mortgage fraud — banks audit occupancy and can call the loan due.
When is this calculator unreliable?
When ignoring the substantial differences between investment property and primary residence loans (higher down payment, higher rate, stricter reserves, different tax treatment). For investment analysis, cash-on-cash return after all expenses is the relevant metric, not just mortgage payment. For tax purposes, investment properties have very different treatment than primary residences (depreciation, passive loss rules, recapture at sale) requiring professional tax planning.
References & Authoritative Sources
- Internal Revenue Service (IRS) — Publication 527: Residential Rental Property · consulted June 1, 2026 · U.S. tax treatment of rental property income and expenses
- Fannie Mae — Selling Guide — Investment Property Loan Underwriting · consulted June 1, 2026 · Conforming conventional investment property loan standards
- National Association of Realtors (NAR) — Investment Home Buyers Report · consulted June 1, 2026 · Industry data on U.S. investment property market
Related Calculators
Data Sources & Benchmarks
This calculator draws on 2 independent, dated sources.
Methodology & Review
Investment property loan payment uses standard amortization formula. The calculator returns monthly P+I. Investment property mortgages differ from primary residence loans: typically 15-25% down required (vs 3-20% for primary); higher interest rate (~0.5-1.5% premium); stricter DSCR / reserve requirements; non-owner-occupied designation; tax-deductible interest as business expense; depreciation on building creates tax shield. RELIABILITY: Reliable for amortization calculation. Less reliable as complete investment-property cost picture — actual ownership economics include property taxes, insurance, maintenance, vacancy reserve, management fees, capital expenditures, and the tax-impact of depreciation/interest deductibility. Cash-on-cash and cap rate require more comprehensive expense modeling than payment calculation alone.
Updated