Published 2026-09-27 · 16 min read

Best Rental Property Calculators 2026: 6 Tools Ranked for Buy-and-Hold Investors

A rental property calculator is the cheapest due diligence you will ever buy. The right one stops you from overpaying; the wrong one lets you lie to yourself with rounded numbers. This roundup ranks six ways to run the numbers — five software products and the spreadsheet — on analysis depth, data quality, price verified on the vendors' own pages for this update, and the job each one is actually built for. Every tool was assessed against the same sample deal, worked in full below: a duplex offered at $220,000, renting for $2,100 a month combined.

One correction up front, because the earlier version of this page got it wrong: no single tool here does the whole job. Analysis, rent data, and tracking a portfolio you already own are three different jobs, and the vendors themselves draw those lines. DealCheck's own blog states that DealCheck focuses on analysis and acquisition, while its sister platform RentCast focuses on market research and portfolio tracking. The old table here credited DealCheck with portfolio tracking. It does not do that, and this update removes the claim everywhere.

The short list

The one-paragraph verdict

Start with DealCheck if you analyze deals regularly. Its free Starter plan saves up to 15 properties at a time, every plan runs the same core calculators, and paying buys capacity rather than different math. Add RentCast when the rent number itself is the question — its estimates, comps, and market data check the input every calculator depends on, and its portfolio dashboard is where the DealCheck team puts owned-property tracking. Choose BiggerPockets if you are newer and will use the forums and education bundled into Pro. Choose Stessa after closing, to track a property you own. Choose Mashvisor when the question is where to invest, not whether to buy a specific address. Keep the spreadsheet if your own model is genuinely maintained.

What a rental calculator can and cannot do

A calculator does arithmetic. It does not verify rent, taxes, insurance, or repair costs, and it does not know the seller's rent is $200 above anything the street supports. Every output here — cash flow, cap rate, cash-on-cash, DSCR — is exactly as reliable as the inputs, which is why data tools rank alongside analysis tools rather than underneath them.

The four headline metrics, defined once so the worked example needs no glossary:

• Net operating income (NOI) is rent after vacancy, minus operating expenses such as taxes, insurance, repairs, and management — before any loan payment, and conventionally before capital expenditure reserves.
• Cap rate is annual NOI divided by price. It ignores financing entirely, which makes it the cleanest way to compare two properties and the worst way to predict your bank balance.
• Cash flow is what remains after operating expenses, reserves, and the loan payment. Cash-on-cash return is annual cash flow divided by the total cash you put in — down payment, closing costs, and initial rehab, not just the down payment.
• DSCR (debt service coverage ratio) is NOI divided by annual loan payments. Lenders read it as a cushion: 1.00 means the property's operating income exactly covers the debt, with nothing left over.

Two government sources anchor the math underneath every tool here. The Consumer Financial Protection Bureau explains that lenders calculate the principal-and-interest payment with a standard formula, and that the payment depends on the loan amount, the term, and the rate — a fixed-rate loan is calculated so that making every payment pays it off precisely at the end of the term. That is the formula the worked example uses. The Internal Revenue Service's Publication 527 covers the tax side: rental income and deductible expenses are reported each year, and the cost of the building — not the land — is recovered through depreciation, for residential rental property under MACRS straight-line over 27.5 years. Depreciation changes taxable income, never cash flow. Both sources are linked below; this page is general information, not tax or financial advice.

Pricing, verified on the vendors' own pages

Every price below comes from the vendor's own pricing or membership page fetched for this update. Where a vendor's pages disagree with each other, this article reports both figures. Where a page does not publish a figure, it says so instead of filling the gap with a number from a review site.

DealCheck: Starter, Plus, and Pro

DealCheck's pricing page lists three plans. Starter is $0: up to 15 saved properties, 5 property photos, 5 sales and rental comps, 5 templates. Plus is listed at $10 per month: up to 50 saved properties, 15 photos, 10 comps, 10 templates. Pro is listed at $20 per month: unlimited on all four. Premium plans include a free 14-day trial, and the page's FAQ confirms the free limit works as a pipeline: save up to 15 properties at a time, then upgrade or delete deals to add more. Every plan lists the same core feature set, including projected NOI and cash flow, cap rate, cash-on-cash, ROI, return on equity, IRR, gross rent multiplier, break-even ratio, and debt coverage ratio, projections, reports, and side-by-side comparison.

One honest limit, carried over from our head-to-head because it is still true on the page as fetched: the pricing page carries a monthly and yearly toggle advertising 3 months free on yearly billing, but does not state separate monthly and yearly dollar rates side by side. The $10 and $20 figures are the rates displayed. Confirm your billing period's rate at checkout rather than assuming the yearly total. Try DealCheck. Full walkthrough in our DealCheck review, and the head-to-head in DealCheck vs BiggerPockets.

RentCast: the data and tracking layer

RentCast's pricing page, as fetched for this update, describes the product rather than displaying plan prices in its text: nationwide rental data, rent estimates, nearby rental comps (up to 20 similar properties), rental market insights and performance trends, rental data reports, a rental portfolio dashboard, real-time rent alerts, historical rent tracking, market update emails, and a Zapier integration. The page does not state a free-tier property limit or a Pro dollar price in the fetched text, and this article will not recycle the $12 figure older reviews quote — if the current paid price matters to you, confirm it on the pricing page in your browser, where the plan cards render the amounts.

What the official pages do establish is the shape of the offer. RentCast's portfolio pages offer a free start, describe adding properties and leases to a portfolio dashboard with historical rent trends and alerts, and its official API documentation states a free API plan includes up to 50 free requests per month, with paid API plans priced by volume in the API dashboard. So: free entry exists on both platform and API; the platform's current paid dollar price is a gap on the official page as fetched, flagged here rather than papered over. Try RentCast. See how it stacks up as an analyzer in our RentCast vs DealCheck comparison.

BiggerPockets: calculators inside a membership

The BiggerPockets calculators are not sold separately on the official pages checked. Unlimited calculator access is a Pro benefit, and Pro is priced three ways on the membership pages verified for the companion comparison and re-checked for this update: Pro Monthly at $39 per month billed monthly; Pro Annual at $32.50 per month, billed as $390 annually; and Pro 2 Years at $28 per month, billed as $672 every two years. A Scale tier at $125 per month billed annually sits above Pro as an education cohort, not a calculator tier. Pro also includes the forums, networking, education, lease packages, and partner perks — which means the honest price question is never "what do the calculators cost" but "what is the whole membership worth to you."

The gap in BiggerPockets' published pricing is the free tier. The official pages checked do not state how many calculator reports, if any, a free member may run before the Pro paywall applies. Older discussions quote counts from membership structures that no longer exist, and this article will not recycle them. Test the allowance on a free account if it decides the purchase for you.

Stessa: free tracking, paid depth

Stessa's pricing page lists three plans, and all plans include unlimited properties. Essentials is free: automatic bank feeds, basic financial reports, vacancy marketing, tenant screening, maintenance tracking, online rent collection, and one portfolio. Manage is $12 per month paid annually, or $15 paid monthly, adding a Schedule E report, legal forms, accelerated rent payments, and unlimited lease agreements. Pro is $28 per month paid annually, or $35 paid monthly, adding unlimited portfolios, all advanced reports, budgeting and pro-forma analysis, and unlimited receipt scanning. Note what is absent at every tier: a pre-purchase deal analyzer of the DealCheck kind. Stessa's pro-forma is a budgeting feature inside an accounting product — consistent with its job as the strongest free option here for a portfolio you already own, not a tool to underwrite a property you have not bought. Our Baselane vs Stessa comparison covers the accounting side in depth.

Mashvisor: market research, at market-research prices

Mashvisor's pricing page displays three plans: Lite at $49.99 per month, Standard at $74.99 per month, and Professional at $99.99 per month, with Enterprise priced by contact. Lite covers traditional and Airbnb income and ROI analysis for individual properties, plus opportunity scores and short-term-rental regulatory rules. Standard adds discovering profitable properties, neighborhoods, and cities, side-by-side comparison, and 20 Excel exports per month. Professional adds multifamily listings, 60 Excel exports with property PDFs, and bulk listing analysis. The page offers quarterly and yearly billing with up to 20 percent saved yearly — and its own AirDNA-alternative page lists Lite at $39.99 per month when billed annually, against the $49.99 displayed on the pricing page as fetched. Both figures are the vendor's; quote the one for your billing period, at checkout. There is no free plan on the pricing page; a Mashvisor FAQ elsewhere describes signing up free to explore limited data, reported here as limited free exploration, not a free tier. At roughly $600 a year for Lite billed monthly, Mashvisor is the most expensive entry here — defensible during a market-selection project, hard to justify as a daily calculator.

The spreadsheet: free, and priced in hours

Every tool above is, at heart, a spreadsheet with data feeds and better presentation. A well-built personal model costs $0 and handles any metric you can formula. Its costs are maintenance and error risk: no comps feed, no rent data, no screening, and nobody checking your formulas. The paid tools earn their keep on data and time, not on math you could not do yourself — the worked example below is deliberately rebuildable in a spreadsheet.

Analysis depth: what each one actually calculates

DealCheck publishes the longest metric list here, on its pricing page and rental calculator page: cap rate, cash-on-cash, ROI, return on equity, IRR, gross rent multiplier, break-even ratio, and debt coverage ratio, with projected NOI and cash flow for rentals, BRRRR projects, and short-term rentals; rehab costs and flip returns; per-unit rent rolls; dozens of financing structures; and projections — cash flow, returns, equity accumulation, and tax deduction projections — for up to 35 years, with a sale analysis for each year. Its calculator page also describes sales and rental comps, imports from public records and listings, side-by-side comparison, purchase-criteria screening, and a maximum offer calculator that works backward from your targets to a price. One internal disagreement to budget around: the calculator page says you can pull up to 20 comps for any US property, while the pricing page caps comps at 5 on Starter, 10 on Plus, and unlimited on Pro. Treat the pricing page as the limit that governs your account.

The BiggerPockets rental calculator, on its own page, takes property information, loan details, income, and an itemized expense list — taxes, insurance, utilities, repairs, capital expenditures, management, HOA, garbage, sewer, vacancy — and returns cash flow, cash-on-cash, cap rate, and compound annual growth rate, explaining the 1 percent and 50 percent rules alongside. Its wider suite is strategy-based: separate calculators for long-term rental, flipping, BRRRR, wholesaling, mortgage, the 70 percent rule, and short-term rental. The inputs are the most beginner-legible here, and the forums remain its distinctive second opinion.

RentCast calculates the inputs rather than the deal: rent estimates from comparable listings, market averages and trends by zip code, and historical rent tracking against the estimate once a property is in its portfolio dashboard. Its numbers belong at the start of an analysis, in DealCheck, BiggerPockets, or your spreadsheet.

Stessa calculates performance after the fact: property-by-property income, expenses, and dashboard metrics from connected accounts, with tax-ready reporting. Mashvisor calculates at market and neighborhood level first, property level second. Neither substitutes for a line-by-line underwrite of a specific duplex at a specific price.

A worked example, with real weekdays

Weekdays below were verified for 2026. The property is a hypothetical duplex offered at $220,000, its two units renting for a combined $2,100 a month — the same sample deal the original version of this page used, now with every assumption stated so you can rebuild it in any tool here and get the same answers.

On Monday, November 2, 2026, the listing appears. You save it in DealCheck on free Starter — property one of fifteen — and check the rent in RentCast, because $2,100 is the seller's figure until comps confirm it. On Tuesday, November 3, 2026, you run the full analysis with identical assumptions in each tool: 25 percent down, a $165,000 loan at 7 percent over 30 years, closing costs of $3,300, and $8,000 of initial rehab. On Wednesday, November 4, 2026, you run the sensitivity — the same deal at $200,000. On Thursday, November 5, 2026, you export the report you would send a lender or partner. On Friday, November 6, 2026, you make the offer decision. Five business days, listing to decision, with the arithmetic finished on day two and the judgment taking the rest.

Now the numbers at the $220,000 asking price. Using the standard fixed-rate formula the CFPB describes — payment set by loan amount, term, and rate so the loan pays off exactly over its term — the payment on $165,000 at 7 percent for 30 years is $1,097.75 a month, or $13,172.99 a year. Monthly operating deductions, as entered: vacancy at 5 percent of rent, $105; property taxes, $260; insurance, $115; repairs at 5 percent, $105; capital expenditure reserve at 5 percent, $105; and management at 8 percent, $168. Those total $858 a month. Rent of $2,100 minus $858 leaves $1,242; minus the $1,097.75 loan payment leaves monthly cash flow of $144.25, or $1,731.01 a year. Cash invested is the $55,000 down payment plus $3,300 closing costs plus $8,000 rehab, which is $66,300. Cash-on-cash return is $1,731.01 divided by $66,300, which is 2.61 percent. Net operating income, excluding the capital reserve and the loan, is $2,100 minus $105 vacancy, $260 taxes, $115 insurance, $105 repairs, and $168 management, which is $1,347 a month or $16,164 a year — a cap rate of $16,164 divided by $220,000, which is 7.35 percent, a gross rent multiplier of $220,000 divided by $25,200 of annual rent, which is 8.73, and a debt coverage ratio of $16,164 divided by $13,172.99, which is 1.23.

The tax layer, kept separate on purpose: if land is assumed to be 20 percent of the price — an assumption to replace with your own allocation, stated here only to make the arithmetic checkable — the depreciable building basis is $176,000, and straight-line depreciation over 27.5 years under the method Publication 527 describes is $176,000 divided by 27.5, which is $6,400 a year. That $6,400 reduces taxable rental income. It does not add a cent to the $144.25 of monthly cash flow, and any calculator or spreadsheet that lets it do so is wrong.

Read the deal the way an underwriter does: a 7.35 percent cap rate looks respectable, a 2.61 percent cash-on-cash return does not, because 7 percent leverage eats the spread, and a 1.23 DSCR is a thin cushion over the debt. At $200,000 — a $150,000 loan, a $997.95 payment, $61,000 invested — the same rent and expenses give $244.05 a month, $2,928.56 a year, 4.80 percent cash-on-cash, an 8.08 percent cap rate on price, and a DSCR of 1.35. The $20,000 cut is worth $99.80 a month and 2.19 points of cash-on-cash return. That backward calculation — from target return to maximum price — is what a maximum offer tool automates, and it is the single most valuable run in either workflow. Neither tool makes the seller accept $200,000; both stop you paying $220,000 while telling yourself the deal was fine.

Now price a year of the habit, using only verified figures. DealCheck Starter costs $0 while you hold no more than 15 saved properties at once; Plus is $120 over twelve months at the displayed rate; Pro is $240. BiggerPockets Pro is $390 billed annually, with the membership in that figure. Stessa Essentials is $0; Manage billed annually is $144 a year; Pro billed annually is $336. Mashvisor Lite at $49.99 a month is $599.88 over twelve months before any yearly saving. RentCast's platform price is the honest blank here, for the reason given above. At low deal volume the conclusion is the same everywhere: the free tiers exist, subscriptions are priced for weekly use, and a tool you open twice a year should cost you nothing.

The 10-step deal-analysis checklist

1. Verify the rent before you analyze anything: pull comparable listings in RentCast or a comp tool, and replace the seller's rent with the supported figure if they differ.

2. Get the real tax and insurance figures — the current tax bill and a quote, not the listing's rounded numbers — because a $100 monthly error in either moves cash flow more than any metric choice.

3. State every assumption in one place: down payment, rate, term, closing costs, rehab, vacancy, repairs, capital reserves, and management, even if you self-manage, so a partner or lender can rebuild your result.

4. Run the deal at the asking price first and record cash flow, cap rate, cash-on-cash, and DSCR together — never a single metric alone, because each of the four hides a weakness another exposes.

5. Run the sensitivity the same day: a lower price, a higher rate, and a higher vacancy, one change at a time, and note which assumption the deal survives least well.

6. Work backward from your minimum acceptable cash-on-cash return and DSCR to a maximum offer price, and write that number down before any conversation with the seller or agent.

7. Check the free-tier limits against your pipeline before subscribing: 15 saved properties on DealCheck Starter, for example, binds your archive, not your ability to analyze — delete dead deals and the slot returns.

8. Keep the tax layer separate: apply the 27.5-year straight-line depreciation to the building basis only, per Publication 527, on the tax side of the model, and never let it inflate cash flow.

9. Decide where the property goes after closing before you buy it: RentCast or Stessa for owned-portfolio tracking, because the analysis tool that found the deal is not the tool that should account for it.

10. Set the renewal rule for any subscription when you start it: the monthly deal count below which you cancel at the next renewal, written down while this arithmetic is in front of you.

Spreadsheet-native portfolio tracking: the Rental Portfolio KPI Command Center for Landlords 2026 ($14.95) is a portfolio cash-flow dashboard with per-property KPIs and rate/vacancy stress tests — the post-close tracking companion to the calculators above.

And once the deal closes, the next money question is where the rent lands — our landlord banking guide covers accounts built for rental cash flow.

Read the rules yourself: primary sources

Every link below is an official vendor or government page checked for this update.

• DealCheck pricing — plan names, displayed rates, limits, trial, every-plan features, free-plan FAQ: dealcheck.io/pricing
• DealCheck rental calculator — 35-year projections, comps, comparison, imports, maximum offer calculator: dealcheck.io/features/rental-property-calculator
• DealCheck blog on RentCast — its statement that DealCheck is analysis and acquisition while RentCast is portfolio tracking: dealcheck.io/blog
• RentCast pricing — product features, portfolio dashboard, rent alerts, historical rent tracking: rentcast.io/pricing
• RentCast portfolio tracking — adding properties and leases, historical rent trends, rent alerts: rentcast.io/features/rental-property-tracking
• RentCast API documentation — free API plan at 50 requests per month, paid plans by volume: developers.rentcast.io
• BiggerPockets membership types — Pro Monthly, Annual, and 2 Years pricing, and Scale: biggerpockets.com/membership-types
• BiggerPockets Pro membership — $32.50 billed annually, unlimited calculators, Pro Perks: biggerpockets.com/pro-membership
• Stessa pricing — Essentials free, Manage and Pro rates, unlimited properties on all plans: stessa.com/pricing
• Mashvisor pricing — Lite, Standard, and Professional displayed rates and billing toggle: mashvisor.com/pricing
• IRS Publication 527 — rental income, deductible expenses, and residential depreciation over 27.5 years: irs.gov/publications/p527
• CFPB on mortgage payments — how lenders calculate principal and interest, and what the payment depends on: consumerfinance.gov

Frequently Asked Questions

What is the best rental property calculator in 2026?

For regular deal analysis, DealCheck, on the evidence in this roundup: its free Starter plan saves up to 15 properties, every plan runs the same core calculators — cap rate, cash-on-cash, IRR, DSCR, and projections up to 35 years — and its paid plans at a displayed $10 and $20 a month are the cheapest subscriptions here. It is an analysis tool only; rent data and owned-portfolio tracking belong to RentCast, and post-purchase accounting to a tool like Stessa.

Is DealCheck really free?

Yes, within stated limits. Starter is $0, and DealCheck's pricing-page FAQ confirms a free plan may save up to 15 properties at any given time — deleting a deal frees a slot. Photos, comps, and templates are capped at 5 each. Paid plans raise those caps — 50 properties and 10 comps on Plus, unlimited on Pro — without changing the calculators, which every plan includes.

Does DealCheck track a portfolio I already own?

No. That claim appeared in the earlier version of this page and has been corrected. DealCheck's own blog states that DealCheck focuses on analysis and acquisition, while its sister platform RentCast focuses on market research and portfolio tracking. DealCheck saves and compares deals you are analyzing — a pipeline, not a record of rent collected and expenses incurred on properties you hold. For owned properties, use RentCast's portfolio dashboard or an accounting tracker such as Stessa.

How much does RentCast cost?

Its official pricing page, as fetched for this update, describes the platform's features — rent estimates, comps, market insights, portfolio dashboard, alerts — without displaying plan dollar prices in its text, so this article does not quote a platform price. What is verified on official pages: free entry exists, and the official API documentation states a free API plan includes up to 50 requests per month, with paid API plans priced by volume in the API dashboard. Confirm the current platform price on the pricing page before subscribing.

How much do the BiggerPockets calculators cost?

They are not sold separately on the official pages checked. Unlimited access is a Pro benefit: $39 per month billed monthly, $32.50 per month billed as $390 annually, or $28 per month billed as $672 every two years. Pro also includes forums, education, lease packages, and partner perks, so the membership price is not a calculator-only price — it is good value only if you use more of the membership than the calculators.

What do cap rate, cash-on-cash, and DSCR actually tell you?

Cap rate is annual net operating income divided by price: it compares properties while ignoring financing. Cash-on-cash return is annual cash flow after the loan payment, divided by all cash invested — down payment, closing costs, and rehab: it measures what your own money earns. DSCR is NOI divided by annual loan payments: it measures the cushion over the debt. In this page's worked example at $220,000, the same duplex shows a 7.35 percent cap rate, a 2.61 percent cash-on-cash return, and a 1.23 DSCR at once — which is why no single metric should decide a purchase.

Does depreciation increase a rental property's cash flow?

No. Under IRS Publication 527, residential rental property is depreciated straight-line over 27.5 years on the building's basis, excluding land. Depreciation is a non-cash deduction that reduces taxable rental income; it does not change rent collected, expenses paid, or the loan payment. In the worked example, an assumed $176,000 building basis gives $6,400 a year of depreciation against taxable income, and exactly $0 of additional monthly cash flow. This is general information, not tax advice.

Which tool should a first-time investor start with?

Start free, in two places. Run your first deals on DealCheck Starter at $0, where the 15-property limit will not bind a beginner, and check every rent assumption in RentCast's free entry before trusting it. Use a free BiggerPockets account for its forums and education while you learn the metrics. Subscribe only when a limit actually binds: a piling-up pipeline points to DealCheck Plus or Pro, wanting unlimited calculators inside an active community points to BiggerPockets Pro Annual, and owning your first property points to Stessa Essentials — still free — for tracking it.

The bottom line

Match the tool to the job, in order. Verify the rent with RentCast's data, underwrite the deal in DealCheck — free for a 15-property pipeline, a displayed $10 a month for 50 properties, $20 for unlimited — or inside a BiggerPockets Pro membership you will use beyond its calculators, hunt markets in Mashvisor only while market selection is the live project, and hand every closed property to RentCast or Stessa for tracking, because analysis software does not become accounting software at closing. Keep a spreadsheet if you maintain it honestly. The habit that matters more than any subscription: same assumptions, every metric, a sensitivity run, and a maximum price written down before the offer. Try DealCheck free or check a rent in RentCast and run this page's duplex through both — your rebuild should match the numbers above to the dollar.

Compare more landlord software

• Landlord software compared: all reviews & comparisons
• DealCheck Review 2026: Rental Property Analysis for Landlords
• PropStream Review 2026: The Real Estate Data Platform for Finding Off-Market Deals
• RentCast Review 2026: Rental Market Data & Property Records for Investors