SBA 504 loan calculators

Four calculators for SBA 504 borrowers, plus a tool for anyone still deciding which SBA program to apply for. Nothing is saved and nothing is sent anywhere, and the math runs in your browser.

The monthly payment on one note

The SBA 504 loan calculator takes an amount, a rate, and a term, and returns the monthly payment, the total interest, and the total cost of financing. It prices a single note at a single rate, which is the right tool when a bank or a CDC has already quoted you one piece and you want to see the payment behind it.

The part a single-rate calculator cannot tell you

A 504 loan is not one loan. A bank or credit union takes a first lien for roughly half the project, a CDC takes a second lien behind it on an SBA-guaranteed debenture for about 40%, and you put in the rest. The two notes carry different rates over different numbers of years, and only one of them can balloon, so no single rate describes the deal.

The SBA 504 blended rate calculator sizes both notes together. Enter the project cost and the terms of each piece, and it returns the contribution you have to make, the size of each note, the combined monthly payment, the balloon on the bank note, the smaller payment that runs after that balloon, and one effective blended rate solved from the actual payment stream rather than averaged from the two coupons.

Two things it gets right that most 504 math gets wrong. Your contribution rises to 15% for a new business or a limited or single purpose property, and to 20% for both at once, and the piece that shrinks is the CDC's, not the bank's. And the CDC note is larger than 40% of your project, because the upfront fees are financed into a gross debenture that is rounded up to the next even thousand.

Reach for it before you set a 504 quote next to a 7(a) quote. Comparing a debenture rate against a 7(a) rate is comparing 40% of one deal against all of another.

What it costs to get out early

The SBA 504 prepayment calculator answers a question whose real answer surprises almost everyone: the premium is not a percentage of your balance. SBA Form 1504 sets it as the balance times the debenture rate times a factor for the year you are in, so a 3% debenture costs half what a 6% debenture costs in the same year on the same balance.

Use it when you are weighing a refinance, a sale, or an early payoff. The factor declines every year and then stops mattering entirely, after year 10 on a 20 or 25 year debenture and after year 5 on a 10 year debenture, and the calculator shows you which year you are standing in.

What the business itself is worth

The business valuation estimator is not strictly a 504 tool, but it answers the question that comes first in a change of ownership. It works from seller's discretionary earnings and the multiple range small owner-operated businesses actually trade in, and it returns a range rather than a single figure, because a single figure would be false precision. No email required.

Still deciding between SBA programs?

The 504 program is narrow on purpose. It finances owner-occupied real estate and long-life equipment, and it cannot fund working capital or inventory. If you are not certain 504 is what you need, the SBA program picker asks five questions and shows the reasoning behind its recommendation, and the comparison page sets 7(a), 504, and Express side by side.

What none of these decide

None of these is a quote. The bank's rate is the bank's. The debenture rate is set at a sale rather than quoted to you, with 20 and 25 year debentures pooling monthly and 10 year debentures every other month. CDC servicing fees and SBA's annual service fee sit on top of the coupon, so the rate you should enter in the blended calculator is the effective rate your CDC gives you, not the number printed on the debenture.

When you want figures from a real bank and a real CDC, tell us about the project and we route the inquiry to SBA lending partners.