For something that quietly governs whether you get a flat, a phone contract, or a mortgage at a rate that doesn't make you wince, the credit score is astonishingly badly understood. Most of what people "know" about it is a mix of half-truths, outdated advice from a parent, and myths that were never true in the first place. And the cost of that confusion lands unevenly — women are more likely to take career breaks, more likely to come out of a divorce with a credit file built around someone else's account, and therefore more likely to discover a thin or damaged score at exactly the moment they need a strong one.
So let's clear it up properly. A credit score is just a lender's shorthand for one question: if we lend you money, how likely are you to pay it back on time? Everything that moves the number is some version of evidence for or against that. Once you see it that way, most of the advice sorts itself into "actually matters" and "myth."
What genuinely moves the number
Two things dominate, and they're not the ones people obsess over. The first is payment history — whether you pay at least the minimum, on time, every single month. One missed payment can knock a healthy score down by 80 to 100 points and sit on your file for six years, which makes a forgotten £15 minimum the most expensive mistake in personal finance. The second is credit utilisation: how much of your available limit you're actually using. Run a card at 90% of its limit and your score suffers even if you always pay on time, because to a lender it reads as someone living close to the edge.
The practical target is to keep your balance under about 30% of your limit, and under 10% if you want the score to genuinely shine. That doesn't mean spending less, necessarily — it can mean paying the card down before the statement date rather than after, so the balance reported to the credit agencies is the low one. It's a small timing trick that moves real points.
The myths worth binning
A few beliefs do active harm because they sound responsible:
- "Checking my own score will lower it." It won't, ever. That's a soft search, invisible to lenders. You can check it weekly with no effect, and you should.
- "I should close old cards I don't use." Often the opposite — closing your oldest account shortens your credit history and shrinks your total available limit, nudging your utilisation up. Usually better to keep it open and put one small recurring bill on it.
- "Carrying a small balance and paying interest helps." A genuinely persistent myth. You get the same benefit by using the card and clearing it in full; paying interest is just a donation to the bank.
- And the one that catches a lot of women: "We're married, so we share a credit score." You don't. There's no such thing as a joint score — only joint accounts, which link your files and let one person's mistakes drag the other down.
That last point is the one to sit with, because it's where the real risk hides.
Why this lands harder on women
Here's the uncomfortable structural bit. A woman who spends years with the household bills in her partner's name, or who shares accounts where he's the primary holder, can reach her forties with a credit file that barely exists — financially invisible despite running an entire household. Then comes a remortgage, a divorce, or simply an application in her own name, and the thinness of the file becomes a problem that takes years to fix.
The fix is to build a file that's genuinely yours, starting now, regardless of how settled things feel. Hold at least one credit product in your own name — a card you use lightly and clear monthly is plenty. Make sure your name is on the electoral roll at your current address, which is one of the quietest, most overlooked score-boosters there is. If you've been a financial associate of an ex, formally request a "notice of disassociation" so their file stops affecting yours. None of this assumes a relationship will fail. It assumes your financial identity should stand on its own either way — which it should.
Start with the boring fifteen minutes
If you do one thing after reading this, pull your actual report — not just the headline number, the full report — from one of the agencies. Free is fine; the statutory report costs nothing. Read it for two things: anything you don't recognise, and your name on the electoral roll. Errors are common, and a single wrong default that you dispute and get removed can do more for your score in a month than a year of careful spending. The number isn't a verdict on your character. It's a record you're allowed to correct.