Utilisation matters more than most people expect

This looks at credit utilisation from the practical end — what holds up once conditions stop being ideal.

What is actually reported

Card issuers typically report the statement balance rather than the balance after you pay it. That means someone who clears the card in full every month can still show high utilisation if they spend heavily before the statement date. Paying down before the statement date, rather than after it, is the mechanism that changes what is reported.

The threshold is lower than the limit

Models generally treat rising utilisation as increasing risk long before the limit is reached. Keeping usage well below the available limit is the practical guidance, rather than merely staying under it. The exact thresholds are proprietary and vary, which is why specific percentage folklore should be treated cautiously.

Closing cards can backfire

Closing an unused card removes its limit from the total available credit, which raises utilisation on the remaining balance. It can also shorten the average age of accounts, which some models weigh.

Keeping an old card open with occasional small use is often better than closing it, provided it costs nothing to hold.

Limit increases cut both ways

A higher limit reduces utilisation arithmetically and can improve the picture. It also increases available credit, which affordability calculations for other lending may count against you. For a mortgage application in particular, large unused limits are not always helpful.

Some of this will suit you and some will not, and that is the point.

What to do before applying for something large

Reduce balances several months ahead so the reported figures fall, since files lag reality. Avoid new applications in the months before, because recent searches and new accounts both register. Check the file for accuracy well in advance, as corrections take time to propagate.

The takeaway

Pay down before the statement date, and think twice before closing an old card.

Small and repeatable beats ambitious and abandoned, almost every time.