The Truth About Credit Scoring: Why Chasing a High Score Could Be Hurting Your Mortgage Chances
Author: Andy Bedford » Publish Date: 9 June 2025
When it comes to building your credit profile, the internet is awash with well-meaning advice. Credit reference agencies often promote a strategy of regular borrowing, spending on credit, and applying for new lines of credit to “build a score.” But for many aspiring homeowners—especially those early in their UK financial journey—this guidance can be more harmful than helpful, at least in the short term.
This article explores how credit scoring really works when it comes to mortgage applications, why “building credit” through borrowing may backfire, and why you may already be mortgage-eligible—even if you’ve never had a credit card.
The Credit Building Myth: Why More Isn’t Always Better
Credit reference agencies like Experian and Equifax frequently advocate a proactive approach to credit building: take out a credit card, use it regularly, repay in full, and consider increasing your credit limit over time. These actions, they argue, demonstrate responsible borrowing and improve your score.
But here’s the catch: these same activities often create red flags for mortgage lenders.
- Too many credit applications in a short space of time? That’s a hard search footprint spree—mortgage lenders might see you as financially desperate. It’s also a high-risk indicator for identity fraud.
- Multiple credit cards or high balances, even if managed well? That can raise concerns about your overall debt-to-income ratio and signal over-reliance on credit or a debt appetite that could become unhealthy.
- New lines of credit shortly before a mortgage application? Many lenders interpret this as financial instability.
So, while your numerical score might be inching upwards, your mortgage eligibility could be quietly sliding downwards.
What Lenders Actually Want to See
Contrary to popular belief, mortgage lenders don’t just look at your “credit score” as a magic number. They consider a broader financial portrait, including:
- UK address history (residency length and consistency)
- Presence on the electoral roll (if possible)
- Current credit commitments (and how stretched they make your finances)
- Bank account stability
- Affordability assessments based on income—not just credit
In fact, most applicants with just one or two UK current accounts, a mobile contract or a utility bill will pass credit scoring—even at high loan-to-value ratios—after just a year or two of UK residency.
This is especially true if they’ve kept their credit history clean (i.e., no missed payments, defaults, or excessive credit usage) and have consistent address history.
Other factors also affect things. Regularly moving home, borrowing high income multiples, or financial pressures like having dependents may also impact your score.
No Credit? No Problem—Sometimes
A common misconception is that “no credit history” equals “bad credit.” But this isn’t always the case.
There are plenty of borrowers who have:
- Never taken out a credit card
- Never had a loan
- Lived in shared accommodation since childhood (so no bills in their name)
- Just opened their first UK current account
And yet—they pass credit scoring for a mortgage.
How? Because lenders weigh up a combination of risk factors. For many mortgage providers—especially those operating in the high loan-to-value space or serving younger borrowers—the absence of credit data is not automatically a dealbreaker. It’s certainly better than a credit file littered with missed payments, payday loans, or an overabundance of credit utilisation.
To put this into context: we recently had an application approved by a high street lender, on top-tier rates, for a foreign national with only 18 months’ UK residency, a 15% deposit, and no credit data at all. She was also a fixed-term contractor.
On the flipside, we’ve seen applicants with very high incomes, good credit history, big deposits, and high scores declined for reasons such as over-utilisation of available credit or an excessive debt-to-income ratio.
What Does Harm Mortgage Eligibility?
Here’s where the contradiction becomes obvious. While general credit advice pushes borrowers toward more borrowing, the factors that can seriously harm your mortgage chances include:
- Multiple hard searches in the last 3–6 months
Lenders see this as high-risk behaviour. It suggests financial strain or desperation. - Too many active credit lines
Even unused cards can cause concern because of potential borrowing power. - High credit utilisation
Using more than 30% of your available credit—especially if near the limit—can make you seem financially stretched. - High debt-to-income ratio
Even if all your payments are up to date, owing sums that account for a high proportion of annual income indicates a higher risk of default. - Short UK residency
Newcomers are already subject to stricter scrutiny. Layering risky credit behaviour on top can lead to an outright decline.
Incorrect information is also a major factor in failed credit scoring for those with limited credit data.
Credit scoring is a risk assessment system. The less data held on an individual, the greater the importance of consistency. With the rise of online account management, it’s easy to forget to update your address on your mobile phone, PayPal account, or a dormant bank account.
But inconsistency heightens the perception of risk. So it’s vital for those with limited data to ensure their records are consistent, up to date, and accurate.
We even saw one applicant declined—despite a good income, clean credit, and a large deposit—simply because he had numerous accounts under his nickname “Brad” instead of his legal name “Bradley”. Issues like this can take months to fix, so address them as early as possible.
A Smarter Approach: Focus on Stability & Accuracy—Not Activity
If you’re planning to apply for a mortgage in the near future, the best credit advice is actually quite simple:
- Avoid new credit applications for at least 3 months before applying.
- Don’t take out credit unless absolutely necessary.
- Keep existing accounts open and in good standing—but use them sparingly.
- Register on the electoral roll at your current address if eligible.
- Maintain consistent UK address history.
- Get your statutory credit report for free from Experian, Equifax, and TransUnion.
- Ensure your information is accurate: use your full legal name, correct date of birth, and current address across all active accounts.
- Use a good mortgage advisor.
In short, less is often more. Yes, it’s in our interest to suggest using a broker—but it’s also in our interest to help you succeed. If you’re declined, we don’t get paid either. That’s why we work from a “first, do no harm” perspective—using credit checks sparingly and only with lenders aligned with your profile.
Final Thoughts: Rethink the “Credit Score Game”
The idea that you must be constantly borrowing to prove your creditworthiness is deeply flawed—especially in the mortgage world. For many borrowers, particularly young adults and new UK residents, overplaying the credit game can actively harm short-term eligibility.
Mortgage lenders want to see financial responsibility, not financial activity. That means stable accounts, low or no debt, and consistent behaviour—not a long list of hard credit checks or juggling multiple cards.
While using credit doesn’t inherently harm your score—and may help build it over time—it’s not a panacea for credit worthiness.
Before you take out that next credit-builder card or personal loan, ask yourself:
Is this helping me in the long term—or just ticking a box on a generic credit checklist?