Eight seconds · Three sliders

Your calculator says one number. Your lender says another.

Both are looking at the same property. Only one of them is looking at the rent. Drag the rent, the rate, or the amortization and watch the two answers separate. That difference is cash you bring to closing.

One multifamily property · $600,000 after repair
Change the rent, the rate or the amortization below — everything else on this property stays fixed.
$5,800 per month
$3,000$6,000$9,000

Drag to change the monthly rent and see both loan amounts recalculate.

7.50%
5.00%7.25%9.50%

Drag to change the interest rate and see both loan amounts recalculate.

30 yrs
15 yrs30 yrs

Drag to change the amortization period and see both loan amounts recalculate.

What every calculator reports
75% of value
$450,000
Three-quarters of the appraisal. It does not move, because it never looks at the rent.
Not the binding limit
What a lender advances
Sized on coverage
$394,014
The largest loan this property’s income can service at 1.20× coverage.
This is your loan
$55,986 short

Where the two lines cross

The flat line is every calculator’s answer. The rising line is a lender’s. Below the crossing point, coverage decides your loan and the appraisal is beside the point.

Loan amount against monthly rent. The 75% loan-to-value line is flat at $450,000. The coverage-sized line rises with rent and crosses it at about $6,625 a month. $0 $200k $400k $600k 75% of value — $450,000 Coverage-sized $3,000/mo $6,000/mo $9,000/mo Gross monthly rent
After-repair value$600,000
LTV cap75%
Minimum coverage1.20×
Vacancy5%
Operating expenses40% of effective income
Nothing is hidden here. Every assumption is listed above and the arithmetic runs in your browser. Rent, rate and amortization are yours to change right here — the coverage minimum, the expenses and the vacancy recompute the same way on the full tool.
Why this happens

A lender applies two tests. Most calculators apply one.

Test one — the value test

Appraised value × loan-to-value cap.

Test two — the coverage test

Net operating income divided by the minimum coverage ratio, then the loan that produces that payment.

The loan is the lesser of the two. Not the average. Not the one you budgeted for.

That’s why a deal can appraise perfectly, show a handsome cash-on-cash return, and still leave you short on the day you sign.

Your numbers, not this example

Run a real property through both tests in the Deal Desk.

Free, no account. The Deal Desk applies both limits to whatever you put into it and tells you which one is binding.

Free · no account · change any number and the whole analysis re-runs