What is a material adverse change?

Claudia AinsleyWritten byClaudia Ainsley
Reviewed byMatt Leeburn
Updated 26 Aug 2026

A material adverse change is a significant deterioration in your financial position that, under a MAC clause, lets a lender decline to fund a facility or demand repayment.

Also known as: MAC clause, material adverse effect, MAE

Key points

  • The clause is the lender's escape hatch between approval and settlement, and often a continuing condition after drawdown.
  • Contracts rarely define "material" precisely, so a lot rests on the lender's judgement and on how the clause is drafted.
  • Common triggers include losing a major customer, a large legal claim, or a sharp fall in trading revenue.
  • A commitment letter subject to no material adverse change is not the same as unconditional finance.

How a material adverse change clause works

What counts as material

What borrowers can do about it

Example

Not to be confused with

Covenants
covenants are specific promises you must keep, while a material adverse change clause is deliberately general
Commitment letter
a commitment letter sets out the offer, and the clause is the condition that can withdraw it

Frequently asked questions

How does a material adverse change clause work?

It lets the lender stop or unwind the deal if your position gets significantly worse than it was at approval. Depending on the drafting, the lender can refuse to fund at settlement, block further drawdowns, or treat the change as an event of default under the contract.

What counts as a material adverse change?

Something serious enough to affect your ability to meet the contract: losing a customer that drives most of your revenue, a major legal claim, insolvency of a key supplier, or a sharp and sustained fall in trading. A temporary wobble or a known issue usually does not count.

Can a lender withdraw approval before settlement?

Yes, if the approval was conditional and a condition is no longer met. That is exactly what this clause is for. It is one reason approvals are described as conditional until settlement, and why brokers push to keep the window between approval and settlement short.

Can you negotiate a material adverse change clause?

Usually you can narrow it rather than remove it. Ask for a test tied to your reported financials, exclusions for disclosed or industry wide events, notice before the lender acts, and a chance to fix the problem. Have your lawyer review the wording before you sign.

What is the difference between a MAC clause and a covenant?

A covenant is a specific, measurable promise, such as keeping a ratio above a set level or lodging accounts on time. A material adverse change clause is broad and judgement based. Covenants tell you exactly where the line sits, while this clause deliberately does not.

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Sources

This article is general information only and is not financial advice.