Credit Limit Increases: How They Are Assessed and the Utilisation Trap

A credit limit increase is one of the few financial products that can improve your credit profile without you spending anything — and one of the easiest ways to make it worse. Which one it turns out to be depends almost entirely on what happens after the limit goes up.

Your provider cannot simply raise it

Under the National Credit Act a credit provider may not increase your limit unilaterally. It needs your request or your written agreement.

You may be offered an arrangement where increases are proposed periodically and you can accept or decline each time. If you agreed to that at some point, offers will keep arriving. You can withdraw that consent in writing at any time, and it is worth doing if the offers are a temptation rather than a tool.

What this means practically: an increase is something you ask for, deliberately, for a reason — not something that happens to you.

What the provider actually assesses

An increase is a new credit assessment, not an administrative change. The provider must conduct an affordability assessment before granting it.

They look at:

Your income, usually with recent payslips or three months of bank statements.
Your existing obligations across all credit providers, from the bureau record — including debts you have stood surety for.
Your conduct on this account. Consistent full or well-above-minimum payments matter more than the balance itself.
Your overall bureau record, including any adverse listings.

A declined request is not neutral. It usually leaves an enquiry on your record, and enquiries in clusters read as someone shopping for credit under pressure.

The utilisation effect, which is the real reason to do it

Credit utilisation is the proportion of your available credit that you are using. It is one of the larger inputs into a credit score, and it is calculated on your revolving facilities — cards, store accounts, overdrafts.

The arithmetic is what makes an increase attractive:

A R10,000 limit with a R4,000 balance is 40% utilisation.
Raise the limit to R20,000 and hold the same R4,000, and it is 20%.

Nothing about your debt changed. Your profile improved, because the ratio improved. Conventional guidance is to keep utilisation below roughly 30%, and the lower the better.

This only works if the balance stays where it was. An increase that gets spent leaves you at the same utilisation with twice the debt and a larger minimum payment. That is the trap, and it is why lenders offer increases: most people use them.

When to ask, and when not to

Ask when:

Your income has genuinely risen since the limit was set.
You have six to twelve months of clean conduct on the account.
You are deliberately managing utilisation ahead of a home loan or vehicle finance application — but do it months in advance, not weeks, so the enquiry ages and the improved ratio has time to report.
Your limit is genuinely too low for ordinary use, so you brush against it every month.

Do not ask when:

You are already carrying a balance you cannot clear.
You have applied for other credit recently. Cluster the enquiries and you look like a risk.
You are about to apply for a home loan in the next month or two. A fresh enquiry immediately before a bond application is poorly timed.
The reason is that money is short. A limit increase is not income, and using it as income is how a manageable balance becomes a permanent one.

The cost of a higher limit you do use

The NCA caps what a credit facility may charge. For a credit card or store card the ceiling is the repo rate plus 14 percentage points — at the current repo rate of 7.00%, that is 21.00% a year. Providers may charge less, and many cards sit at or just under the cap.

On top of interest there is a monthly service fee, and where credit life cover is attached, a premium calculated per R1,000 of cover per month.

The practical point: a R10,000 balance carried for a year at 21% costs meaningfully more than most people estimate, because the minimum payment is calculated as a small percentage of the balance and therefore falls as the balance falls — stretching the term almost indefinitely. Paying a fixed amount rather than the shrinking minimum is often the single change that clears the debt.

A worked example

Take someone with a R30,000 card limit, a R15,000 balance, and a R60,000 overdraft they do not use.

Their revolving utilisation is not 50%. It is calculated across the facilities: R15,000 used against R90,000 available, which is roughly 17% — already healthy. The unused overdraft is doing quiet work for them.

Now suppose they close the overdraft because it costs a monthly fee. Available credit drops to R30,000 and the same R15,000 balance becomes 50% utilisation. Nothing was borrowed, nothing was repaid, and their profile got materially worse on the day they cancelled a facility they were not using.

Run it the other way. They keep the overdraft, ask for a card increase to R50,000, and hold the balance. Available credit becomes R110,000, utilisation falls to about 14%, and if they are planning a bond application in six months the ratio has time to report and the enquiry has time to age.

The whole benefit sits in the word hold. Spend the new R20,000 and utilisation goes to 32% with R35,000 of debt and a larger minimum payment every month.

Timing it around a home loan

This is where the advice becomes concrete, because a bond application is usually the largest credit decision a person makes and the one most sensitive to their profile.

Bond originators look at both the score and the affordability calculation, and those two respond to a limit increase in opposite directions. A lower utilisation ratio helps the score. But a larger available limit can count against affordability, because some assessors treat available revolving credit as potential future debt.

The practical sequence that works: sort out utilisation six months or more before applying, then leave everything alone. No new applications, no closures, no limit changes in the final quarter. A settled profile with clean recent conduct assesses better than one that has been actively optimised in the weeks before submission.

If the goal is a bond rather than a better card, paying the balance down beats raising the limit — it improves the ratio and the affordability calculation at the same time.

Asking properly

Check your credit record first, and fix errors before applying — see how to read and understand your credit report.
Have the documents ready: latest payslips, three months of statements.
Ask for a specific amount with a reason, rather than the maximum available.
Make one request, not several across providers in the same month.
Then do nothing with it. The benefit is the unused headroom.

A note on closing old cards

People often close an old card after opening a better one, assuming a tidier profile helps. It usually does the opposite.

Closing a card removes its limit from your total available credit, which raises your utilisation on the same balance. It can also shorten the average age of your accounts. If the card is free to hold, leaving it open with a zero balance is generally better for your profile than closing it — provided it is not a temptation.

Where the card carries an annual fee, that calculation changes, and the fee usually wins.

Frequently asked questions

Does asking for an increase hurt my credit score?

The enquiry is recorded and has a small effect. A single, well-spaced request matters little; several in a short period read as distress.

Will a higher limit improve my score?

Indirectly, by lowering utilisation — provided your balance does not rise to match it. If it does, the effect reverses.

Can my bank lower my limit without asking me?

A provider can reduce a limit in certain circumstances, and does not need your consent in the way an increase does. A sudden reduction usually reflects something on your bureau record worth checking.