ROI Math: free, fast, no account
ROI Math focuses on the core underwriting math and gives it away free. The cap rate, cash-on-cash return, DSCR, and property tax calculators run instantly in the browser with no sign-up and no usage cap. The trade-off is scope: ROI Math does not store deals, pull comps, or export PDF reports.
DealCheck: full deal analysis with comps
DealCheck is a dedicated real estate analysis app used by hundreds of thousands of investors. It adds sales and rental comps, saved properties, offer tools, and exportable reports, with a generous free tier and paid Plus ($14/mo) and Pro ($29/mo) plans for unlimited use. If your workflow centers on analyzing and comparing many deals with supporting data, DealCheck does more than a free calculator can.
BiggerPockets: calculators plus community
BiggerPockets pairs a suite of 10+ calculators (rental, BRRRR, flip, multifamily) with its well-known investor community, forums, and education. Free members get a handful of calculator reports; unlimited access and printable lender-ready reports require a Pro membership (around $39/mo). It is a strong fit if you want the tools and the community in one place.
Who each is best for
- ROI Math — investors who want quick, free, unlimited return math without creating an account.
- DealCheck — investors who analyze many deals and need comps, saved pipelines, and exportable reports.
- BiggerPockets — investors who want a full calculator suite alongside community, forums, and education.
Frequently asked questions
What is the best free alternative to DealCheck?
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ROI Math is a free alternative for the core return math — cap rate, cash-on-cash return, DSCR, and property tax — with no account or usage limits. DealCheck remains the better choice if you need saved properties, sales and rental comps, and shareable PDF deal reports, which ROI Math does not offer.
Are BiggerPockets calculators free?
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BiggerPockets lets free members run a small number of calculator reports (about 5), after which unlimited access requires a Pro membership (around $39/month, or $390/year). ROI Math's calculators are unlimited and free with no account.
Do I need to pay for a real estate investment calculator?
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No. For running cap rate, cash-on-cash return, DSCR, and property tax math, free tools like ROI Math are enough. Paid tools such as DealCheck and BiggerPockets Pro add value when you need comps, saved deal pipelines, printable lender reports, and portfolio management.
What is the difference between ROI Math and DealCheck?
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ROI Math is a free, no-login set of single-purpose calculators that update instantly in the browser. DealCheck is a full real estate analysis app with property comps, saved deals, offer tools, and exportable reports, offered through a free tier plus paid Plus and Pro plans.
DealCheck and BiggerPockets are trademarks of their respective owners. This is an independent comparison based on publicly available information as of June 2026; pricing and features change, so verify current details on each provider's website.