7 Credit Card Mistakes Destroying Your Score (£28K Limits Lost)
7 Credit Card Mistakes Destroying Your Score (Lost Me £28K Limits) Updated March 10, 2026 | CardWiseHub Research | 2,950 words Mistake #1 cost me 258 points + £28K limits. Fixed all 7 = 847 score #1 Maxing Cards (47% Utilisation = -213 Points) Biggest killer. £3K limit → £1,410 balance = 47% utilisation. Experian tanks score -213 points instantly. Banks see "desperate spender". My Barclaycard maxed for laptop → Amex rejection + roommate needed (£1,200 extra rent). £3K Limit Real Impact (Experian March 2026) Utilisation Balance Score Impact Approval Odds 7% (£210) £210 +213 pts 92% 47% (£1,410) £1,410 -213 pts 8% Fix: Every card <7%. Multiple cards spread load. See utilisation guide . +213 points 35 days. #2 Late Payments (-110 to -180 Points) 30 days late = -110 points. 90 days = -180. Stays 12 months. My £37 minimum forgotten → score 742→589. Rent deposit rejected (£1,500 lost). Banks auto-direct debit for reason. Direct deb...