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Ranking · 9 min read

Best free rental property calculator 2026: 5 tools that actually work for free

A criteria-based 2026 ranking of five free rental-analysis options: TrueCap, DealCheck Starter, Stessa's calculator, spreadsheet templates, and Zillow's mortgage calculator.

Published 2026-06-07 · Updated 2026-08-27

Quick answer

TrueCap offers unlimited core rental analyses without signup. A free account adds one comps lookup and creation of read-only share links; recipients can view without an account. DealCheck Starter includes rental, BRRRR, Airbnb, and flip calculators plus professional interactive and PDF reports, with published usage limits. Stessa combines an investment-property marketplace and editable acquisition analysis with accounting and operations. Spreadsheet templates offer flexibility but require formula and input review. Zillow's mortgage calculator covers payment math rather than a full rental underwrite.

This ranking uses the published free access available when reviewed August 27, 2026. Verify current terms on the official DealCheck pricing, Stessa pricing, Stessa marketplace, Stessa returns calculator, BiggerPockets calculator, BiggerPockets Pro, and TrueCap pricing pages.

The tools, ranked for free-only investors

#1 · No-signup preliminary rental screening

TrueCap

Deep dive

Pricing: Free core analyzer; paid Pro plans on the live pricing page

Free tier covers

  • +Cap rate, CoC, DSCR, NCF, monthly cash flow
  • +Editable HUD rent + FRED owner-occupied rate benchmarks; manual local property tax
  • +Selected-rule fit, with a secondary Screening Index
  • +Unlimited preliminary core screens without signup
  • +Save up to 5 deals + dashboard access
  • +One sale and rent comps lookup
  • +Read-only share links (free sign-in to create; recipients do not sign in)

Where the gates kick in

  • −10-year projection (Pro)
  • −10-year cash-flow and equity projection + sensitivity (Pro)
  • −Offer Ceiling and saved-deal comparison (Pro)
  • −Editing, unlimited saves, and comparison of up to 4 deals (Pro)
  • −Additional comps lookups: Pro includes 50 per month
  • −PDF export (Pro)
Pick if: You want preliminary core rental metrics without paying or creating an account.
#2 · Free multi-strategy calculators and professional reports

DealCheck Starter

Deep dive

Pricing: Starter is free; paid Plus and Pro plans raise usage limits

Free tier covers

  • +Rental, BRRRR, Airbnb, and flip calculators
  • +Professional interactive and PDF reports
  • +Up to 15 saved properties

Where the gates kick in

  • −Published limits on photos, comps, and templates
  • −Paid plans raise or remove usage limits
  • −Account required
Pick if: You want several strategy calculators and professional reports on a free account.
#3 · Public acquisition calculator plus a free accounting entry point

Stessa's Free Calculator

Deep dive

Pricing: Essentials is free; Manage and Pro are paid — verify current terms

Free tier covers

  • +Free Essentials accounting and basic financial reports
  • +Public rental returns and income-tax calculator

Where the gates kick in

  • −Schedule E is listed on current Manage and Pro plans, not Essentials
  • −Marketplace access and terms should be verified on Stessa's live pages
  • −Target-derived Offer Ceiling is not described in the official sources reviewed
Pick if: You want a public acquisition calculator plus a free entry plan for ongoing accounting.
#4 · Best if you already have a custom model

Excel / Google Sheets templates

Deep dive

Pricing: Free (or your existing Office / Google subscription)

Free tier covers

  • +Total flexibility — model anything
  • +BiggerPockets and various REI bloggers offer free templates

Where the gates kick in

  • −Most templates require manual rent, rate, and tax lookups
  • −Formulas and inputs require independent review
  • −Large spreadsheets can be cumbersome on mobile
Pick if: You have a battle-tested Excel template and use mobile rarely.
#5 · Best for PITI only (not actually rental underwriting)

Zillow's mortgage calculator

Deep dive

Pricing: Free

Free tier covers

  • +Monthly mortgage payment (PITI)
  • +Affordability calculator

Where the gates kick in

  • −Doesn't calculate cap rate, CoC, DSCR, or cash flow
  • −Not a rental property tool — homebuyer-oriented
Pick if: You only need the mortgage payment math, not the full rental underwrite.

Quick decision matrix

  • “You want a preliminary core screen without signup.” TrueCap.
  • “You want free BRRRR and flip calculators with professional reports.” DealCheck Starter.
  • “You already use Excel and have a template that works.” Excel.
  • “You want free accounting for properties you already own.” Stessa Essentials.
  • “You only need PITI math.” Zillow's mortgage calculator.

FAQ

Is TrueCap really free for core rental analysis?
Yes. TrueCap's no-account preliminary screen covers cap rate, cash-on-cash, DSCR, NOI, and monthly cash flow. A free account adds up to 5 saved deals, one comps lookup, and the ability to create read-only share links; recipients can view a link without an account. The first complete decision, evaluation allowance, and paid terms are described on the live pricing page.
Is BiggerPockets' rental property calculator free?
The current official BiggerPockets rental-property-calculator page presents calculator results as a Pro feature. Access, trial, and membership terms can change, so verify both the official calculator page and Pro page before choosing it as a free option.
What's the catch with TrueCap's free tier?
Preliminary core metrics are available without signup. Creating read-only share links, saving up to 5 deals, and using the included comps lookup require a free account; recipients can open a shared link without an account. The first complete decision and 21-day account evaluation are usage-limited; Investor Pro adds the repeatable paid workflow described on the live pricing page.
Can I underwrite a BRRRR or flip on a free calculator?
DealCheck Starter currently includes its BRRRR and flip calculators plus professional reports, subject to published usage limits. TrueCap splits the job: released standalone tools cover rehab cost, ARV, and the 70% rule price screen, and the no-signup analyzer screens the stabilized rental — cap rate, cash-on-cash, DSCR, and cash flow — once you enter the post-rehab rent and loan terms. There is no separate DSCR page to run the refinance test in; the integrated BRRRR and fix-and-flip lifecycle models are not currently released either, so keep a project ledger alongside.
How should I compare free calculator plans?
Check which metrics, strategy calculators, reports, saved-property limits, comps, and sharing tools are included before entering a deal. Product access and pricing change, so verify current terms on each provider's official page and confirm every starting assumption with property-specific evidence.

Try TrueCap free

The fastest way to know which tool fits your workflow is to run one of your real deals through it. TrueCap is free for the core underwriting, takes 60 seconds, no signup required. Browse the full set of free rental property calculators, start with the 1% rule calculator, or see how the numbers play out in a specific market like our Atlanta rental market breakdown.

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