Free Rental Income Calculator
Calculate gross rent, net cash flow, cap rate, and true cash-on-cash return for any rental property — AI-powered, Rentcast data integrated.
Tell Freddie about your rental property:
What you get — free
Rentcast Rent Estimates
Pull real comparable rental data for your specific address — no guessing on what the market will bear.
Net Cash Flow
True monthly and annual cash flow after all expenses — not the inflated gross rent number.
Cap Rate & CoC Return
Both metrics calculated together so you see the full picture of rental property performance.
Deal Score 0–100
Freddie grades your rental deal A–F on cash flow, cap rate, and market fundamentals.
Rental vs Flip Comparison
Model both exits and see which pencils better before you close.
Free Forever
Core rental income analysis permanently free. No credit card.
Why rental income didn't beat a 30-day wholetail on this Northern Virginia deal
We pulled the rental income estimate on this Northern Virginia hoarder house before we closed. Rentcast showed $2,100–$2,300/month for the zip code. After taxes, insurance, management, and maintenance, the net cash flow was barely $400/month at the $210K purchase price. That's a 2.3% cash-on-cash return — nowhere near our 8% threshold. The wholetail exit at $349K for $115,050 in 30 days wasn't even close. The rental income calculator told us to flip before we ever put the key in the lock.
We sold the property as-is for $349K. The renovation pictured was completed by the buyer who purchased it from us. The $115,050 profit reflects our wholetail exit, not the renovation work.
Freddie scored the wholetail exit 100/100. The rental income analysis confirmed the flip — not the other way around. Run both before you decide.
"Rental income lesson: gross rent is a fantasy number. Net cash flow after every expense is the only number that matters — and it has to beat your cost of capital to make sense."
Rental Income FAQ
How do I calculate rental income?
Gross rental income = monthly rent × 12. Net rental income = gross income minus vacancy, property management, taxes, insurance, maintenance, and capital expense reserves. Freddie calculates both automatically from your inputs.
What expenses reduce rental income?
Key expenses include: vacancy allowance (5-10%), property management (8-10%), property taxes, insurance, maintenance (5-10% of gross rent), capital expense reserves, and any landlord-paid utilities.
What is a good rental income return?
Target 8-12% cash-on-cash return for single-family rentals. In high-cost markets like Northern Virginia, 6-8% is more realistic. Freddie benchmarks your property against market norms automatically.
How do I estimate rent for a property?
Use Rentcast (integrated into FreeDealCalc) to pull comparable rental data for your specific address. Freddie can pull a rent estimate directly for your deal so you're not guessing.
Should I flip or rent a distressed property?
It depends on your cash position, the property condition, and your market. Freddie models both scenarios simultaneously — you see which exit produces better returns before you decide.
What is the 1% rule for rental income?
The 1% rule says monthly rent should equal at least 1% of the purchase price. A $200K property should rent for $2,000/month. In high-cost markets this is rarely achievable — Freddie models the actual numbers for your market instead.
Calculate your rental income now
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