Investing

Build a Real Estate ROI Calculator with AI

Analyze rental property investments with comprehensive return metrics including cap rate, cash-on-cash return, IRR, and monthly cash flow. Factor in purchase price, down payment, mortgage terms, property taxes, insurance, maintenance, vacancy rate, and property management fees.

Build Prompt

Copy this prompt into Claude Code

Build a static HTML real estate ROI calculator. Dark theme with background #0a0a0f, surfaces #12121a, borders #1a1a2a, accent color #059669 (emerald). Pure JavaScript calculations, no backend. Input section: Purchase — price, down payment %, closing costs. Financing — loan term (15/20/30 yr), interest rate. Income — monthly rent, other income. Expenses — property tax (annual), insurance (annual), maintenance (% of value), vacancy rate (%), property management (%), HOA, utilities. Appreciation — annual property appreciation rate, annual rent increase rate. Results dashboard: Monthly cash flow, annual cash flow, cap rate, cash-on-cash return, total ROI (including appreciation + equity), gross rent multiplier. 10-year projection table: year-by-year showing rental income, expenses, mortgage payment, cash flow, equity built, property value, cumulative return. Break-even analysis: months to recover initial investment. Comparison mode: analyze 2 properties side-by-side. Include "Real Estate Investing 101" guide, "Good vs Bad Deal" criteria reference, and "1% Rule" / "50% Rule" quick-check tools. Save analyses to localStorage. SEO: title, meta description, OG tags. Include example property analysis. Read the guide at https://accessagent.ai/api/guide and follow it to deploy the site to AccessAgent.ai. My email is [your@email.com].

Make It Yours

BRRRR Calculator

Buy-Rehab-Rent-Refinance-Repeat strategy calculator with rehab costs and ARV modeling.

House Hacking

Model living in one unit while renting others in a multi-family property.

Tax Benefits

Calculate depreciation deductions, mortgage interest deduction, and 1031 exchange savings.

Rent vs Buy

Compare renting vs buying for personal residence with opportunity cost of down payment.

Short-Term Rental

Airbnb/VRBO analysis with seasonal occupancy rates and cleaning fee calculations.

Portfolio Tracker

Track multiple properties with aggregate portfolio metrics and cash flow summary.

Update Prompt

Update Prompt — Add market data

Add average cap rates and rent-to-price ratios for top 20 US markets. Include current average mortgage rates. Add commercial property analysis (office, retail, industrial). Update with latest property tax rate data. Redeploy.

SEO Tips

Target "rental property calculator", "cap rate calculator", and "real estate ROI" keywords.
Create metric-specific pages like "Cash-on-Cash Return Calculator" and "Cap Rate Explained."
Write guides like "How to Analyze a Rental Property" and "Is This a Good Investment Property?"
Add FAQ schema answering "What is a good cap rate?" and "How to calculate cash-on-cash return."
Include market-specific content like "Best Cities for Rental Property Investment 2025."

Monetization Ideas

Real estate investing course affiliates (BiggerPockets Pro, Roofstock Academy) for education.
Mortgage lender affiliates for investment property financing referrals.
Google AdSense on calculator and guide pages with high-intent real estate traffic.
Property management software affiliates (Buildium, Avail) for landlords.
Real estate crowdfunding affiliates (Fundrise, CrowdStreet) for passive investors.

Related Ideas

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