Commercial Mortgage Calculator
Amortizing P&I plus an optional interest-only view — not a term sheet. Click any i for detail.
Loan
Loan amount ($)
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Loan
Original principal. |
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Interest rate (%)
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Rate
Note rate. Caps, SOFR margins, and floors are not modeled. |
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Amortizing term (years)
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Term
Amortization used for P&I. The balloon may be shorter (not modeled as a maturity date). |
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IO years (optional)
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IO
If > 0 the headline shows interest-only; amortizing P&I still appears in the breakdown. |
How to use this calculator
- Enter loan, rate, and amortizing years.
- Leave IO at 0 for fully amortizing P&I.
- Set IO years to see the interest-only payment as the headline.
- Compare to DSCR separately.
Results explained
Amortizing payment uses P × r / (1 − (1+r)^(−n)) with monthly r. IO = principal × rate / 12. DSCR needs NOI — that’s the DSCR loan calculator.
Quick reference: commercial P&I
25-year amort / 5- or 10-year balloon is a common structure — balloon not dated here.
| Item | Detail |
|---|---|
| IO payment | Principal × rate / 12 |
| Amortizing | Standard mortgage formula |
| DSCR | NOI ÷ PITIA |
| Residential payment | See mortgage pages |
Tax and insurance escrow may sit on top of this P&I.
How the estimate is built
P&I = standard amortizing pmt; IO = P×rate/12.
Example scenario
$850,000 at 6.75% over 25 years — read P&I on the result (IO=0).
FAQ
Bridge loan?
Often IO — set IO years > 0.
Prepay penalty?
Not modeled.
Occupancy / TIs?
Outside payment math.