Calculate gross and net rental yield with full expense breakdowns, vacancy rate modeling, and 10-year cash flow projections. Help property investors quickly evaluate whether a deal pencils out.
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Build a static HTML rental yield calculator for property investors. Dark theme: background #0a0a0f, surfaces #12121a, borders #1a1a2a, accent #b45309 (amber). Pure vanilla JavaScript, no backend.
Income inputs: Purchase price, Monthly rent, Number of units, Annual rent increase % (default 3%), Other income (laundry/parking, $/month).
Expense inputs (each with a toggle to enter as $ or % of purchase price): Property taxes ($/year), Insurance ($/year), HOA fees ($/month), Property management (% of rent, default 10%), Maintenance/repairs (% of rent or $/year), Vacancy rate (%, default 8%), Utilities paid by landlord ($/month), Mortgage payment (link to mortgage calc section below), Capital expenditures reserve (% of rent, default 5%).
Financing section: Purchase price, Down payment (%), Interest rate (%), Loan term, auto-compute monthly P&I.
Outputs panel (updates live on any input change):
- Gross Rental Yield: Annual rent / Purchase price
- Net Rental Yield: (Annual rent - All expenses) / Purchase price
- Cap Rate: NOI / Purchase price
- Cash-on-Cash Return: Annual cash flow / Total cash invested
- Gross Rent Multiplier: Purchase price / Annual rent
- Monthly cash flow (positive in green, negative in red)
- Annual NOI
- Break-even occupancy rate
- Time to recoup down payment (years)
10-year projection table: Year, Rent income, Expenses, NOI, Debt service, Cash flow, Cumulative cash flow, Property value (at assumed appreciation %), Total equity. Show as both table and inline SVG line charts.
Color-code results: green if positive cash flow, red if negative, yellow if marginal (within 5% of break-even).
SEO: title "Rental Yield Calculator — Net Yield, Cap Rate, Cash-on-Cash", JSON-LD schema, meta tags.
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
Deal Analyzer Mode
Enter a Zillow or Redfin URL and auto-populate purchase price, tax estimates, and rental comp data.
Portfolio View
Add multiple properties and see combined portfolio yield, total NOI, and aggregate cash flow.
BRRRR Calculator
Model the Buy, Rehab, Rent, Refinance, Repeat strategy with after-repair value and refinance math.
Market Benchmarks
Show average cap rates and GRM for the target market alongside user's property inputs.
Sensitivity Analysis
Slider to adjust rent or vacancy ±20% and see live impact on all return metrics.
Tax Benefit Calculator
Model depreciation deductions, mortgage interest deductions, and effective after-tax yield.
Research current average property management fees, maintenance cost benchmarks, and typical vacancy rates for US rental markets in 2026. Update the calculator's default values and the "Market Benchmarks" tooltip content. Redeploy to AccessAgent.ai.
SEO Tips
Target "rental yield calculator", "cap rate calculator", "cash on cash return calculator" — investors search all three.
Write a "What is a good rental yield?" explainer section — captures informational queries that convert to tool users.
Create city-specific pages with pre-filled average rents and home prices for top 20 rental markets.
Add FAQ schema answering "What is cap rate?", "What is cash-on-cash return?", "What is GRM?" for featured snippets.
Publish a "Rental Property Calculator Guide" blog post linking to the tool as the primary resource.