Rental Property Cash Flow Calculator
Compute monthly cash flow, NOI, cap rate, and cash-on-cash return for any rental property. Tests against the 1% and 50% rules. Free, no signup.
Rental Property Cash Flow Calculator
Full BiggerPockets-style rental analyzer. Enter purchase price, financing terms, gross rent, and operating costs. Returns monthly cash flow, NOI, cap rate, cash-on-cash, and tests against the classic 1% and 50% rules of thumb.
Rules-of-thumb checks
How to Use the Rental Cash Flow Tool
Pull realistic rent comps
Use Zillow Rent Zestimate + Rentometer + 3 active listings within ¼ mile of the same bed/bath count. Newcomer mistake: anchoring on listed rent rather than rent-comp data. Be conservative — the wrong rent assumption breaks every downstream number.
Set reserves honestly
Maintenance 5-10% of rent (newer property low end, older high). CapEx 5-10% of rent (roof, HVAC, water heater amortization). Vacancy 5-8% in stable markets, 10%+ in turnover-heavy ones. Property management 8-10% if you outsource; 0 if you self-manage but include your own time as opportunity cost.
Check against the 1% and 50% rules
1% Rule: monthly rent ≥ 1% of purchase price. Hard to find in 2026 except in low-cost Midwest/South markets. 50% Rule: total operating expenses should be ≤ 50% of gross rent. These are screening filters — properties that fail both are usually negative cash flow at typical financing.
Target cash-on-cash, not cap rate alone
Cap rate is the unlevered yield. Cash-on-cash includes mortgage leverage and is the actual return on dollars in. Most US investors target 8-12% CoC for residential. Below 6% you're essentially betting on appreciation rather than current cash flow.
Rental Property Math — The Numbers That Decide a Deal
The Four Numbers That Matter
Rental real estate is a numbers business. The four metrics that matter most: NOI (Net Operating Income — gross rent minus all operating expenses, BEFORE mortgage), cap rate (NOI divided by purchase price, the unlevered yield), cash-on-cash return (annual cash flow divided by total cash invested, AFTER mortgage), and GRM (Gross Rent Multiplier — price divided by annual gross rent, the inverse of cap rate for quick screening). Each tells a different story. NOI is what the property earns regardless of how you finance it. Cap rate is what you'd earn paying cash. Cash-on-cash is the actual leveraged return. GRM is the fastest way to screen a list of properties before doing the full analysis.
Most rookie mistakes are in the operating expense column. The standard "PITI + maintenance" framing undercounts by 30-50% of true long-run expense. Real operating expenses include: property taxes, insurance, HOA, vacancy reserve (5-8% of rent), maintenance reserve (5-10%), CapEx reserve (5-10% — roof, HVAC, appliances), property management (8-12% if outsourced — and include your own time even if self-managing), utilities IF landlord-paid, accounting + legal. A "PITI breakeven" property with no reserves is almost always negative cash flow over a 10-year hold.
The 1% and 50% Rules — Useful Screens, Not Decision Rules
The 1% Rule: monthly rent should be at least 1% of purchase price. A USD 200K property should rent for at least USD 2,000/month. This was easier to find in 2010-2020; in 2024+ it's mostly Midwest/Southeast markets where it holds. The 50% Rule: total operating expenses (NOT including mortgage) should be roughly 50% of gross rent. Combined, they say "if a property passes both, cash flow at typical financing is usually positive." Properties failing both rarely cash flow without substantial down payment. Properties that pass one but fail the other warrant deeper analysis — the rules are screening heuristics, not investment decisions.
BiggerPockets' database analysis suggests typical residential rentals in 2024 cluster at: cap rate 5-7% (high-cost coastal), 7-9% (Sun Belt cities), 9-12% (Rust Belt + rural). Cash-on-cash with 25% down at current 7% mortgage rates: 6-9% for most positive-cash-flow markets. Investors targeting 12%+ CoC typically need either lower-cost markets, value-add rehabs (BRRRR strategy), or alternative-use cases (short-term rental, house hacking).
"BiggerPockets' typical analysis: a property looks great until you fully load the operating expenses. The difference between 'PITI + 5% maintenance' analysis and 'PITI + 8% maintenance + 8% CapEx + 5% vacancy + 8% PM' is often USD 300-500/month — enough to flip cash flow from positive to negative."
Tax Treatment That Boosts Real Returns
Cash-on-cash isn't the full story — US rental real estate offers significant tax advantages that boost the effective return. Depreciation: 27.5-year straight-line on residential, deducted from rental income, creating "paper losses" that offset cash flow. A USD 250K property (improvement value, NOT including land) generates ~USD 9,000/year of depreciation. For a typical leveraged rental, this often zeros out the taxable income. 1031 exchanges defer capital gains tax indefinitely when you sell + replace with another investment property. Mortgage interest is fully deductible against rental income. Cost segregation studies can accelerate depreciation on commercial and short-term-rental properties. For investors in high tax brackets, these advantages typically add 2-4 percentage points of effective return on top of the CoC figure.
10 Facts About US Rental Property Investing
NOI = effective gross income − operating expenses (NOT including mortgage). Cap rate = NOI ÷ purchase price.
The 1% Rule: monthly rent should be at least 1% of purchase price. Mostly Midwest/Southeast in 2024+.
The 50% Rule: opex should be ≤ 50% of gross rent. Combined with 1% Rule, these screen most positive-cashflow deals.
Cap rates 2024: 5-7% coastal, 7-9% Sun Belt, 9-12% Rust Belt + rural. Inverse correlation with price appreciation.
Typical investor down payment: 20-25% for non-owner-occupied. 30%+ for non-conforming markets.
Investor mortgage rate typically 0.5-1.0% higher than owner-occupied at the same credit score.
Depreciation: residential 27.5 years straight-line. USD 250K improvement value = ~USD 9K/yr deduction.
1031 exchange: defers capital gains when selling + replacing with another investment property. 45-day ID + 180-day close.
BiggerPockets is the largest US real-estate investing community — ~3M users, comprehensive rental calculators.
Per Census 2024: ~40% of US rental units owned by individual landlords; 60% by LLCs, REITs, institutional investors.
Frequently Asked Questions
- Depends on market and property type. Class-A urban: 4-6%. Class-B suburban: 6-8%. Class-C value-add: 8-12%. Coastal high-appreciation markets (SF, NYC, Boston) typically trade at lower cap rates because investors price in expected appreciation. Sun Belt and Rust Belt offer higher cap rates with lower appreciation. There's no "right" cap rate — match your strategy (cash flow vs appreciation) to the market.
- Cap rate is the UNLEVERED return — what you'd earn if you paid all cash. Cash-on-cash is the LEVERED return — actual cash flow divided by actual cash invested (down payment + closing + rehab). Cash-on-cash is typically higher because leverage amplifies returns. Use cap rate to compare properties; use cash-on-cash to compare to your own opportunity cost of capital.
- Conventional investment property: 20-25% down minimum. Many lenders prefer 25%+ for the better rate. FHA + VA loans require owner occupancy — can't be used for pure rentals. House-hacking (live in one unit, rent the others in a 2-4 unit) qualifies for owner-occupied 3.5% (FHA) or 5% (conventional) down — the highest-leverage entry point for first-time rental investors. Commercial multifamily (5+ units) often requires 30-35% down.
- In order of frequency: (1) CapEx — the eventual roof, HVAC, water heater, exterior paint cost USD 25-50K every 10-20 years. Without a reserve, single events wipe out years of cash flow. (2) Vacancy — even great properties have 3-5% turnover; expect 1 month of vacancy every 2-3 years. (3) Maintenance — actual maintenance averages 1-2% of property value annually, much higher than rookie estimates. (4) Property management — even if you self-manage, your time is worth something. (5) Lawn care, snow removal, exterior maintenance if your local law makes those landlord responsibilities.
- Residential rental property is depreciated over 27.5 years (commercial: 39). The IRS lets you deduct 1/27.5 of the IMPROVEMENT value (building, NOT land) each year as a non-cash expense against rental income. A USD 350K property with USD 250K improvement value = ~USD 9K/year depreciation deduction. For a typical leveraged rental, this often zeros out the taxable income even though the property is generating positive cash flow. Depreciation must be "recaptured" when you sell (taxed at 25% federal) UNLESS you do a 1031 exchange to defer.
- Section 1031 of the IRC: defer capital gains tax when you sell an investment property AND replace it with another investment property of equal-or-greater value. Strict timing: 45 days to identify replacement, 180 days to close. Must use a qualified intermediary (QI) — you can't touch the funds. The deferred tax compounds — you can keep 1031'ing for decades and only owe the tax at final sale (or "step up" the basis to fair market value on inheritance). Most-used real-estate tax strategy for serious investors.
- Common practice for liability protection. LLC isolates the property's liabilities (lawsuit, accident, debt) from your personal assets. Trade-offs: forming + maintaining the LLC costs USD 100-500/year per state; mortgage transfer to LLC after closing can trigger "due on sale" clause (rare in practice but legally possible); some states require separate property insurance policy in LLC name. Most investors with 3+ properties use either LLCs or umbrella liability insurance (USD 1-2M coverage for USD 200-500/year — easier and often equivalent protection for residential rentals).
- Population growth + job growth + landlord-friendly laws + good price-to-rent ratio. Sun Belt cities (Austin, Charlotte, Tampa, Phoenix, Nashville, Raleigh) have been popular 2020-2024 due to all four factors. Avoid heavy-regulation cities (rent control: SF, NYC, LA portions, Portland, Seattle) for new investments. ATTOM Data + Roofstock publish market reports ranking US cities by rental investment metrics annually. Most successful investors pick 1-2 markets and develop deep local knowledge rather than buying scattered single properties nationally.
- Different business — much higher revenue per night but with seasonality, cleaning costs, platform fees, and operating complexity. STR can produce 1.5-3× the gross revenue of long-term rental on the same property, but operating expenses are 30-50% of gross revenue vs 35-45% for LTR. Use the dedicated Airbnb ROI Calculator for STR-specific math. Many cities have restricted or banned STR — check local STR regulations BEFORE buying with that strategy.
- Yes — no US citizenship or residency required. Foreign investors typically need 30-40% down, an ITIN (Individual Taxpayer Identification Number) for tax filing, and a US-based property manager. Mortgage financing as a foreign national is available but rates are 1-2% higher and only 50-65% LTV. Sungame US rental income is subject to US federal income tax (Form 1040-NR) — typically 30% withholding unless you make the election to file as effectively-connected business income. FIRPTA withholding (15%) applies when selling. Consult a US tax CPA with cross-border experience before purchase.
Related News
You may be interested in these recent stories from our newsroom.
-
Snowflake jumps 36 per cent in a day on an earnings beat and a US$6 billion AWS chip deal
Snowflake had its best day as a public company on 28 May, closing up 36 per cent after a clean first-quarter beat and a five-year, US$6 bill...
-
MAS Scraps Mandatory Financial Advice for Most Complex Product Buyers in Retail Shake-Up
Singapore retail investors buying structured notes, derivatives and investment-linked policies will no longer need mandatory financial advic...
-
SEC Rewrites Float Rules, PSE Moves to Implement Them — Clearing the Path for GCash's USD 1B Philippine IPO
The SEC lowered the public float floor for large Philippine issuers in February 2026. The PSE followed with a consultation paper in April. T...
75 more free tools
Calculators, converters, security tools — no signup.