commercial real estate loan calculator

How to use this commercial real estate loan calculator

This tool is designed to help investors, brokers, and operators quickly estimate the cost of financing income-producing property. Enter your expected loan amount, interest rate, amortization period, and loan term. The calculator then returns your monthly payment and shows whether a balloon payment will be due.

Unlike many residential mortgages, commercial real estate financing often has a shorter term than the amortization period. That means even if payments are based on a 25-year schedule, the loan might mature in 5, 7, or 10 years. At maturity, the remaining principal is due unless you refinance or sell.

What each input means

Loan amount

The principal borrowed from the lender. This is typically based on lender loan-to-value limits and your equity contribution.

Annual interest rate

The nominal yearly rate charged by the lender. Even small changes in rate can materially affect debt service and property cash flow.

Amortization period

The length of time used to calculate periodic payments. Longer amortization usually lowers monthly payments but can increase total interest over time.

Loan term

The actual contract maturity date. If the term is shorter than amortization, a balloon balance remains and must be paid at maturity.

Annual NOI (optional)

Net operating income is a key underwriting metric. If provided, the calculator estimates your debt service coverage ratio (DSCR):

DSCR = NOI / Annual Debt Service

Property value (optional)

If entered, the calculator estimates loan-to-value (LTV):

LTV = Loan Amount / Property Value

Interpreting your results

• Monthly Payment: Your regular principal and interest payment.
• Annual Debt Service: Monthly payment multiplied by 12.
• Total Interest (Term): Interest paid during the selected term, not necessarily the full amortization period.
• Balloon Balance: Remaining principal due at maturity when term < amortization.
• DSCR: A primary lender risk metric; many lenders target at least 1.20–1.35 depending on asset type and market.
• LTV: Leverage ratio used to determine risk and pricing; lower LTV generally improves loan terms.

Example scenario

Suppose you finance a small office property with a $1,500,000 loan at 7.10% interest, amortized over 25 years, with a 10-year term. The payment may look manageable, but because the term is shorter than amortization, a significant balance is still outstanding after year 10. You should plan early for refinance options, reserve strategy, and exit timing.

Commercial lending tips before you commit

• Model both base-case and stress-case interest rates.
• Track refinance risk if your loan has a large balloon payment.
• Keep DSCR cushion above lender minimums to protect against vacancy or expense spikes.
• Compare fixed vs. floating rates and understand rate-cap requirements.
• Review prepayment penalties (yield maintenance, defeasance, or step-down schedules).

Frequently asked questions

Is this an exact lender quote?

No. This calculator is for planning and education. Actual terms depend on lender underwriting, fees, reserves, tenant quality, market conditions, and borrower strength.

Why is there a balloon payment?

Because many commercial loans mature before they fully amortize. The remaining principal is due at term end.

What is a “good” DSCR?

It depends on asset class and market, but many lenders prefer 1.20+ for stabilized assets, with stricter standards for higher-risk properties.

Can I use this for multifamily, retail, office, or industrial?

Yes. The math is universal for amortizing principal-and-interest loans. Just use realistic assumptions for your specific property type.

Disclaimer: This calculator is for informational use only and does not constitute financial, legal, tax, or lending advice.