Seven Wobbly Rungs: The Mortgage Blunders That Send Buyers Sliding Back Down
Photo: Tebzza 2.0, CC0, via Wikimedia Commons
Getting a mortgage is one thing. Keeping your footing on the property ladder for the next 25 years is quite another. We've heard enough horror stories from readers and brokers to fill a book — here are the seven wobbliest rungs, and how to steady them.
1. Borrowing to the Absolute Max
The scenario: Priya, 29, was offered £290,000 and spent every penny of it on a flat in Croydon. When her car packed in six months later, she had zero financial breathing room.
The fix: Just because a lender will lend it doesn't mean you should borrow it. Aim to keep your borrowing at least 10% below your maximum, and stress-test your own budget: could you cope if rates rose 2% at remortgage time?
2. Ignoring Overpayment Flexibility
The scenario: Tom took a cheap two-year fix without checking the small print. When he came into a £5,000 inheritance, he discovered his lender capped overpayments at nothing — and charged an early repayment charge to beat it.
The fix: Before signing, confirm you can typically overpay 10% a year penalty-free. That flexibility alone can shave years off your term.
3. Fixating on the Rate, Not the Fee
The scenario: A 4.02% deal looked better than 4.15% — until the £1,499 arrangement fee was factored in. On a small mortgage, the 'worse' rate was cheaper overall.
The fix: Compare the true cost over your fixed period (rate + fees), or ask a broker to run the numbers for the total cost of comparison.
4. Letting the Fixed Period End Without a Plan
The scenario: Rachel rolled onto her lender's standard variable rate for four months after her fix expired. That lapse cost her roughly £180 a month.
The fix: Diarise your mortgage end date and start shopping for a remortgage deal three to six months early. Most lenders let you reserve a rate in advance.
5. Trashing Your Credit File Before Applying
The scenario: Dan applied for a mortgage a month after opening two new credit cards and financing a sofa. The lender's underwriter wasn't impressed.
The fix: In the six months before applying, avoid new credit, pay everything on time, get on the electoral roll, and check your file with all three main agencies — Experian, Equifax and TransUnion.
6. Underestimating the True Cost of Buying
The scenario: Sophie budgeted for her deposit and nothing else. Stamp duty, solicitor fees, survey, valuation, removals — the 'extras' came to nearly £8,000 and she had to borrow from family at the eleventh hour.
The fix: Budget 3-5% of the purchase price on top of your deposit for buying costs. First-time buyers in England and Northern Ireland currently get Stamp Duty relief up to £300,000, but check the current thresholds — they change.
7. Going Straight to Your Own Bank
The scenario: Mark walked into his high street bank, took the first deal offered, and only later learned a rival lender would have saved him £40 a month — over £12,000 across the term.
The fix: A whole-of-market mortgage broker costs you nothing upfront in most cases and can access deals banks don't advertise, including for self-employed buyers and those with unusual incomes.
Keep Climbing
None of these mistakes are fatal on their own — but stack two or three together and you can find yourself knocked back years. The antidote is boringly consistent: borrow with margin, read the small print, and never treat your lender's first offer as the best one. Your future self, sitting pretty three rungs up the ladder, will thank you.