Free CRE Underwriting Tool

Commercial Mortgage Calculator

Four numbers in. Your payment and deal check out in seconds — then go as deep as a lender would, only when you’re ready.

Live rates10-Yr Treasury 4.69%5-Yr Treasury 4.40%SOFR 3.62%Prime 6.75%as of Aug 7, 2026

Start with the basics — your answer builds beside you as you type.

Your deal
= $600,000 down
Typical CRE range: 6.4–7.3%
Most commercial loans reset early — the remaining balance is due at the balloon.
Annual net operating income — unlocks your DSCR
What the lender sees
Your monthly payment
Principal & interest
Loan amount
— LTV
Annual debt service
12 × monthly
DSCR coverage
add NOI
Balloon
at term end
Cap rate
NOI ÷ price
Cash-on-cash
Year one, pre-tax
Amortization & payoff ›
Lender Math

How much can I borrow?

Commercial loans are sized on debt coverage, not the sticker price. Give me the income and your lender’s floors — your borrowing power updates as you type.

A property that nets a year, financed at % over yrs, held to a × DSCR floor and capped at % LTV
supports a maximum loan of
Owner-User Financing

SBA 504 structure

Owner-occupants can pair a bank first mortgage with a fixed-rate CDC debenture and put as little as 10% down. Illustrative — enter live quotes from your lender and CDC.

The deal

Bank first (50%) · CDC (40%)

CDC share40%
Bank payment
CDC payment
Blended
Equity in
Loan Detail

Full breakdown & payoff

Uses the loan, rate, amortization, and balloon from your Quick Estimate above. Add an origination fee, extra monthly payments, or an appreciation assumption to model the real payoff, equity, and refinance LTV.

Rate Reference

Commercial mortgage rates by lender type

Commercial loans price as a spread over the benchmark indices shown live in the hero pill (10- & 5-Yr Treasury, SOFR, Prime), refreshed daily from U.S. Treasury & Federal Reserve data. The ranges below are typical spreads — confirm exact pricing with Jason. New to commercial lending? Start with how commercial real estate financing works.

Lender typeTypical rateMax LTVMin DSCRBest for
Bank / Credit Union6.75–7.75%Up to 75%1.20–1.30xOwner-occupied & investment; relationship-driven
Life Insurance Co.5.75–6.75%65–70%1.30–1.45xLarge, stabilized, low-leverage assets
CMBS / Conduit6.25–7.25%70–75%1.20–1.25xNon-recourse, 10-yr term, larger loans
SBA 504 / 7(a)6.00–6.75%Up to 90%1.15xOwner-occupants; low down payment
Bridge / Private9.00–12.00%+70–80%Often noneTransitional / value-add; short term

Illustrative only — confirm current pricing before underwriting a deal.

How Commercial Loans Differ

Commercial vs. residential mortgages

A commercial mortgage is underwritten on the property’s income and the borrower’s strength — not just a credit score. Six ways it differs from a home loan:

Balloon terms

Commercial loans rarely run their full amortization. A 25-year schedule with a 5-year balloon means ~85% of the loan is due in one lump sum after five years.

Higher down payments

Expect 20–35% down. SBA 504 owner-occupant loans can go as low as 10%; investment property usually needs 25–30%.

DSCR requirements

Most lenders want a debt-service coverage ratio of 1.20–1.30x minimum — NOI must exceed the annual debt payment by that margin.

Underwritten NOI

Lenders don’t accept the seller’s NOI at face value. Vacancy floors, a management fee, and replacement reserves typically cut it 5–15%.

Borrower strength

Lenders check net worth near the loan amount, 9–12 months of debt-service liquidity, real-estate experience, and a 680+ credit score.

Personal recourse

Many commercial loans require a personal guarantee. Non-recourse loans need larger deals, stronger sponsors, and lower leverage.

Frequently Asked Questions

Underwriting & mortgage questions

Why is the lender’s NOI lower than the seller’s?

Lenders apply standard adjustments: a vacancy floor (5% minimum even if 100% leased, 10% for office), a management fee (3–5% even if you self-manage), and replacement reserves ($0.20–$0.30/SF annually). The result is a lender NOI usually 5–15% below the seller’s — and that is what your loan is sized against.

Does every lender use the same DSCR threshold?

No. Life insurance companies want 1.30–1.45x, bank portfolio loans 1.20–1.30x, CMBS 1.20–1.25x, and SBA 504 / 7(a) as low as 1.15x for owner-occupants. Bridge lenders may require no DSCR at all. The lender-match feature shows which loan types your specific deal qualifies for.

What is a balloon payment?

A balloon is the lump sum owed at the end of a commercial loan term. Lenders amortize over 25 years to keep the payment manageable but only fix the rate for 5–10 years; at term end you refinance, sell, or pay the balance in cash.

What is stress-tested DSCR?

Standard DSCR uses today’s NOI and payment. Stress-tested DSCR shows what happens if rates rise 1%, vacancy climbs 5%, or rents drop 5%. If any scenario pushes DSCR below 1.0x, the deal carries real risk even if today’s number looks fine.

Can I use the printable summary for real deals?

Yes — Full Underwriting mode is built for it. Use it for properties you are evaluating, on-market listings, or deals you are marketing as a broker. The summary includes every input, the lender adjustments, DSCR analysis, and lender match. It is still an underwriting tool, so confirm final terms with a real lender quote.

Glossary

Commercial mortgage terms, explained

Amortization

The schedule of principal + interest payments that pays a loan to zero over a set period — commonly 25 years for commercial.

Balloon payment

The lump sum due at term end. Lenders amortize over 25 years but fix the rate for only 5–10, so the remaining balance comes due.

DSCR

Net operating income ÷ annual debt service. Lenders typically want 1.20–1.35x.

LTV

Loan ÷ property value. Commercial lenders usually cap LTV at 65–80%.

Cap rate

Net operating income ÷ price — a quick measure of unleveraged yield.

NOI

Gross income minus vacancy and operating expenses, before debt service.

Cash-on-cash

Annual pre-tax cash flow ÷ cash invested.

Debt yield

NOI ÷ loan amount; many banks want 9–10%+.

SBA 504

Owner-occupant structure: ~50% bank first, ~40% SBA debenture, ~10% down.

Interest-only

A period where you pay only interest, so the balance doesn’t amortize yet.

Have a real deal on the table?

A calculator gives you the math; a broker gives you the deal. Jason Bitton connects Chicagoland and Lake County buyers, owner-occupants, and investors with the right lenders and the right properties.

Work with Jason →
Or call direct: (847) 858-2909