Prepayment penalties on business loans, and how each type is actually calculated

A prepayment clause is the lender's answer to a specific risk: they priced a loan expecting to earn a yield over a period, and if you hand the money back early they have to redeploy it, possibly at a worse rate. How the clause compensates for that varies enormously, and the difference on a single loan can run to five figures.

Here are the four structures you will meet, with the arithmetic worked through on one loan so the comparison is like for like.

Illustrative only — for every calculation below, assume $300,000 borrowed, a 120-month term, a fixed nominal rate of 7.25% charged monthly, level payments of $3,522.03, and a payoff at the end of month 36 when the balance is $231,481.34. These inputs are chosen to make the structures comparable, not to represent any market.

1. Step-down percentage of the balance

The clause states a percentage that falls each year. A schedule written as 5/4/3/2/1, for example, means 5% in year one, 4% in year two and so on, applied to the balance being prepaid.

On the loan above, paying off during year four at a 2% step means $4,629.63. Paying off during year three at 3% means $6,944.44.

This is the easiest structure to price, and the easiest to plan around: you can simply wait until the step falls, if waiting is cheaper than the penalty.

2. Fixed percentage of the original amount

Less common but not rare. The percentage applies to the original principal rather than the outstanding balance, so it does not shrink as you repay. Two percent of $300,000 is $6,000 whether you prepay in month 6 or month 96. Read carefully which base the clause uses, because "2% prepayment fee" is ambiguous until you know.

3. Yield maintenance and interest-rate differential

This is the structure that produces the large numbers, and it comes in a crude version and a careful one.

That figure is wrong in the borrower's disfavour in two ways: it applies the differential to the opening balance for all seven years, even though the balance amortises to zero, and it does not discount future amounts to present value.

If your loan agreement contains a yield maintenance clause, the specific formula in the document controls, and the three numbers above are $24,000 apart. Ask the lender to show the calculation, and check it against the words in the note.

4. Lockout and defeasance

A lockout period simply forbids prepayment for a stated number of years. There is no fee because there is no option. Defeasance, more common in securitised commercial real estate lending than in general business lending, requires you to substitute a portfolio of securities that replicates the remaining payments rather than paying the loan off. It is expensive, involves third parties, and takes weeks.

The structure that is not called a penalty at all

On short-term products quoted as a total repayment, or on any loan with precomputed or add-on interest, there is frequently no prepayment penalty because there is nothing to penalise: the full cost was fixed at signing and is embedded in the payment schedule. Paying early does not reduce it. What you may be offered instead is a discretionary discount.

Illustrative only — $50,000 funded, $61,500 total repayment over 12 monthly payments of $5,125. After six payments you have paid $30,750 and the contract says $30,750 remains. Suppose the lender offers a payoff of $26,750 today, so your total outlay becomes $57,500. That looks like a $4,000 saving. Measured properly, you paid $7,500 for six months' use of a balance that averaged well under $50,000 — an effective cost of roughly 36.9% on a nominal annual basis. Better than running the full term, and not the same thing as a loan you could exit at par.

The practical point: on a simple-interest amortising loan, prepaying stops future interest. On a precomputed one, prepaying mostly stops future payments. Those are different, and the difference is worth thousands.

What to check before you sign

• Which base the percentage applies to: outstanding balance or original principal.
• Whether the clause steps down, and on what date the step happens.
• Whether partial prepayments are allowed, whether they trigger the fee, and whether they re-amortise the loan or just shorten it.
• Whether the fee is waived on a sale of the business, a refinance with the same lender, or an insurance or condemnation payoff.
• For yield maintenance, the exact reinvestment index and whether the calculation discounts to present value.
• For a precomputed product, whether any part of the finance charge is rebated on early payoff and by what method. See early payoff discount and payoff letter.

Negotiating it

Prepayment terms are frequently negotiable, particularly the step-down schedule and the carve-out for a sale of the business. What underwriting generally weighs is the expected life of the loan against the cost of originating it, so a borrower offering a longer lockout in exchange for a lower margin is making a trade the credit committee understands. Policy varies by institution and by product, and government-guaranteed programmes carry their own prepayment rules that differ from conventional lending — see the SBA programme terms if that is the route you are on.

Ask for the payoff calculation in writing before you sign, not when you want out.