Glossary term

Default Interest

Default interest is a higher contractual interest rate that can apply after a borrower defaults or breaches specified terms of the loan agreement.

Updated

April 21, 2026

Read time

3 min read

What Is Default Interest?

Default interest is a higher contractual interest rate that may apply after a borrower defaults or breaches certain loan terms. It is commonly written into commercial loan documents as an economic consequence of default, late performance, or another trigger defined in the agreement.

The important point is that default interest is not the ordinary stated rate of the loan. It is an escalated rate that becomes relevant only after a specified credit problem occurs. That means it is both a pricing issue and a pressure tool inside a troubled lending relationship.

Key Takeaways

  • Default interest is a higher rate that can apply after default or another stated trigger.
  • It is usually set out in the original loan documents.
  • It can materially increase carrying cost while a troubled loan remains unresolved.
  • It often works alongside other lender rights such as fees, acceleration, or stricter reporting.
  • Its exact applicability depends on the contract and governing law.

How Default Interest Works

If a borrower misses payments, breaches a covenant, or otherwise falls into default under the agreement, the lender may gain the right to charge interest at the default rate. The increase may apply automatically under the contract or only after the lender elects to impose it, depending on the wording.

Default interest can therefore change the economics of delay. The longer the default persists, the more expensive it may become for the borrower to carry the debt.

How Default Interest Increases Lender Protection

Default interest compensates lenders for increased risk, added administration, and the cost of managing a troubled credit. A defaulting borrower is no longer performing as originally expected, so the lender may seek a higher return while the loan remains unresolved.

Default interest is therefore not only punitive in effect. It is also part of the lender's attempt to reprice a credit that has become riskier than the original underwritten transaction.

Default Interest Versus Ordinary Loan Pricing

Rate type

When it applies

Ordinary contract rate

During normal performing status

Default interest

After a defined default or contractual trigger

The default rate is not simply another floating-rate adjustment. It is usually tied to a deterioration in credit status or contractual compliance.

How Default Interest Raises Borrower Costs

Default interest can raise cash burn quickly during a period when liquidity is already strained. It can also change workout negotiations, since the outstanding balance may grow faster while the parties are discussing a forbearance agreement or workout agreement.

In practice, a borrower dealing with distress should pay close attention not only to whether a default has occurred, but also to what the documents say about the economic consequences of that default.

The Bottom Line

Default interest is a higher contractual interest rate that can apply after a borrower defaults or breaches loan terms. It can materially increase the cost of a troubled loan while the lender and borrower work through enforcement, forbearance, or restructuring.

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