Getting a mortgage approved isn’t only about your income. First-time homebuyers encounter pitfalls due to inexperience and the high-stakes nature of the property market, and many buyers with solid earnings and decent savings still run into trouble during the home buying process, not because they can’t afford a home, but because of avoidable missteps made before or during the mortgage application.
Below are the most common mistakes first-time buyers make, and what to do instead to keep your home buying journey on track.
- Only budgeting for the deposit, not the other closing costs
The deposit dominates most buyers’ thinking, but it isn’t the only money you’ll need on completion day. Solicitor fees, valuation fees, survey costs, buildings insurance, and stamp duty (where applicable) are all separate closing costs that need to come from somewhere else. Underestimating homeownership costs can mean overlooking mortgage insurance too, most lenders require buildings insurance in place from exchange, and some buyers are asked to consider income protection products that keep repayments covered if things go wrong.
Emptying your savings for a deposit leaves nothing for emergency repairs or immediate renovations. Many advisers recommend keeping an emergency fund of around 10% of the purchase price set aside once you’ve completed, since homeownership costs can exceed the monthly mortgage payment once you factor in maintenance and unexpected costs.
What to do instead: Build a realistic budget that covers all the costs involved, not just the deposit, legal fees, property surveys, and insurance included. A good mortgage broker can give you an accurate figure for your total upfront costs based on the purchase price you’re targeting, and line up buildings insurance quotes ahead of exchange rather than leaving it to the last minute.
- Ignoring stamp duty and other property taxes until it’s too late
Many first-time buyers are caught off guard by stamp duty, or wrongly assume they’re automatically exempt. While there is meaningful relief available (no stamp duty on properties up to £300,000 if all applicants are first-time buyers, and a reduced rate on the portion between £300,001 and £500,000), this only applies if your situation qualifies. Scotland and Wales also operate under their own separate property tax regimes.
What to do instead: Factor stamp duty and any other property taxes into your budget before you start house hunting. If you’re buying with someone who has previously owned property, get specific advice on how that affects your eligibility.
- Skipping the property survey
Ignoring property surveys can lead to expensive surprises like structural issues or damp that only surface after you’ve moved in. Professional inspections can reveal structural problems that may cost thousands of pounds to put right later, and surveys can also flag boundary disputes that wouldn’t otherwise show up before completion.
There are three main types of property surveys available in the UK, ranging from a basic condition report to a full structural survey, and the right one depends on the age and condition of the property. Investing in a property survey helps you make informed decisions about a home purchase, rather than relying on the estate agent’s description alone, and it protects the resale value of the home you eventually buy.
What to do instead: Don’t skip the survey to save money upfront. Ask your broker or solicitor which level of survey suits the property, and budget for it as a non-negotiable part of your upfront costs.
- Applying for new credit, and other credit file slip-ups
It seems harmless: a new credit card, a buy-now-pay-later purchase, a car finance agreement. But any new credit application leaves a mark on your credit report and can raise red flags for mortgage lenders. Multiple new credit accounts opened in quick succession are a particular concern, and applying for credit right before closing can lower your credit score at exactly the point it matters most.
A higher credit score improves your mortgage approval chances, and credit scores affect mortgage rates and loan terms significantly, so even a small difference in score can change the deal you’re offered. Errors in credit reports are more common than people expect, and they can cost thousands over the life of the loan if never corrected. It’s also worth checking you’re registered on the electoral roll, lenders use it to verify your identity and confirm your address, and being unregistered can delay or even sink an otherwise strong mortgage application.
What to do instead: Avoid opening new credit accounts in the three to six months before you plan to apply for a mortgage. Check your credit report and credit history early to identify potential issues, dispute any errors, and register at your current address on gov.uk if you haven’t already, it’s free and takes minutes.
- Having messy bank statements
Lenders typically review your last three months of bank statements as part of the home buying process. Large, unexplained cash deposits, regular gambling transactions, or chaotic spending patterns can all raise questions about financial pressure, regardless of whether you have enough money. It isn’t about being perfect. It’s about giving the lender a clear understanding of how you manage money.
What to do instead: Tidy up your accounts in the months before applying. Avoid unexplained large deposits, keep spending consistent, and if you’ve received a gifted deposit from a family member, make sure you have the correct paperwork in place, since lenders require formal documentation for gifted funds.
- Relying on a mortgage calculator instead of comparing real mortgage options
Online mortgage calculators are useful for a ballpark figure, but they don’t account for stress testing. Lenders don’t just check whether you can afford your monthly mortgage payments at today’s interest rates, they check whether you could still afford them if rates were to rise. This stress test often reduces the amount you can actually borrow by a meaningful margin, and many buyers are caught out by the gap between the calculator estimate and their real mortgage offer.
It’s also worth understanding that not all mortgages work the same way, and picking the wrong type can cost you over the life of the loan. Fixed rate mortgages lock in your monthly mortgage payment for a set period, giving certainty against rising interest rates, while tracker mortgages move with the Bank of England base rate, which can work in your favour or against it depending on your future plans.
What to do instead: Speak to a whole-of-market mortgage broker who can give you an accurate borrowing figure based on your actual income and outgoings, and who can walk you through fixed rate mortgages, tracker mortgages, and other mortgage options before you start making offers.
- Skipping mortgage pre-approval before viewing properties
A Decision in Principle, also called an Agreement in Principle or mortgage pre-approval, is a lender’s indication of how much they’d be willing to lend you, based on a soft credit check. Skipping mortgage pre-approval can lead to unrealistic budgeting, since you may fall in love with a property that’s outside what a lender will actually offer you, and it’s easy to let emotion override financial judgement once you’ve found “the one,” which is exactly when a firm, pre-approved ceiling price matters most.
Mortgage pre-approval shows sellers you are a serious buyer, and it helps you understand your borrowing limits before you start making offers. Sellers prefer offers from buyers with mortgage pre-approval already in place. Keep in mind that an agreement in principle is typically only valid for 30 to 90 days, so timing it too early in your search means you may need to renew it.
What to do instead: Get a Decision in Principle in place before you start making offers, set a firm ceiling price based on your broker’s borrowing figure rather than what you’d like to spend, and be mindful of the pre-approval’s expiry window so it doesn’t lapse mid-search.
- Leaving the solicitor search too late, and not understanding leasehold and freehold
Many buyers focus entirely on finding the property and sorting the mortgage agreement, and only think about a solicitor once they’ve had an offer accepted. Not instructing a conveyancer early can cause delays in the transaction, and conveyancing timescales are one of the most common reasons purchases fall through or drag on.
This is also the stage where leasehold and freehold properties need careful research. With a freehold property, you own the building and the land it sits on outright. With a leasehold property, you own the building but not the land, you hold the right to occupy it for a fixed term, and you’ll typically pay ground rent and service charges to the freeholder. Buyers who skip this research can be surprised by ongoing costs or restrictions that affect resale value later.
What to do instead: Research and instruct a solicitor or conveyancer early, ideally before your offer is accepted, and ask them to confirm early on whether a property is leasehold or freehold, with a clear breakdown of any ground rent, service charges, and lease length.
- Not opening a Lifetime ISA, or exploring other government schemes
The Lifetime ISA is one of the more valuable government schemes for first-time buyers: it allows you to save up to £4,000 per year and receive a 25% government bonus, up to £1,000 free each year, which can go towards your house fund. The catch is that the account needs to have been open for at least 12 months before you can use the funds to buy a property. Many buyers discover this too late and miss out on a bonus they could have been building toward.
Beyond the LISA, other first-time buyer programmes can reduce the effective cost of a home significantly, and buyers who don’t investigate them often pay more than they need to. In the UK, the Government’s First Homes Scheme caps eligible property prices at £250,000 outside London, and at £420,000 within London, offering the property at a discount to market value for qualifying first-time buyers.
What to do instead: Open a Lifetime ISA as early as possible, even if you can only put a small amount in initially, and ask your mortgage broker or adviser which other schemes you qualify for before you rule anything out, eligibility varies by scheme, region, and lender.
- Going straight to one lender without shopping around
It’s natural to start with your own bank, but going direct limits you to a single lender’s product range. Different lenders assess mortgage applications differently, and some are more favourable to certain income types, employment situations, or credit histories than others.
What to do instead: Use a whole-of-market broker who can compare thousands of mortgage options across lenders, including exclusive deals not available directly to the public. For most first-time buyers, this leads to a better deal and a smoother application process.
The buyers who succeed are the ones who prepare
The common thread running through almost all of these first-time buyer mistakes is timing: starting the process properly before it becomes urgent. The buyers who get approved first time, without drama, are rarely the highest earners. They’re the ones who checked their credit history early, got their paperwork and survey sorted, researched the neighbourhood, schools, transport links, planned developments, and built in an emergency fund for unexpected costs, rather than letting financial pressure or emotion drive a rushed decision.
If you’re not sure where you stand, speaking to an independent mortgage adviser costs nothing and gives you a clear picture of exactly what to do next.
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Frequently asked questions
What is the most costly mistake first-time buyers make? Underestimating the total costs involved, not just the deposit, but stamp duty, valuation fees, solicitor fees, property surveys, and moving expenses, is one of the most common and costly mistakes, since it can derail a purchase at the last minute.
Do I need a property survey? Yes. Skipping a property survey can lead to costly surprises later, including structural issues, damp, and boundary disputes that aren’t visible during a normal viewing. There are three main types of survey available in the UK, and the right level depends on the property’s age and condition.
How does my credit score affect my mortgage? A higher credit score improves your mortgage approval chances and can affect the interest rate and loan terms you’re offered. It’s worth checking your credit report for errors before applying, since mistakes on your file can cost thousands over the life of the loan if left uncorrected.
How long is a mortgage pre-approval valid for? An agreement in principle, also called mortgage pre-approval, is typically valid for 30 to 90 days depending on the lender. If your house search takes longer than that, you may need to renew it before making an offer.
Do I need a mortgage broker, or can I go straight to a lender? You can approach a lender directly, but a whole-of-market mortgage broker can compare mortgage options across the full market, including deals not available directly to the public, which often means a better rate and fewer surprises.
How long before applying for a mortgage should I avoid new credit? Most brokers recommend avoiding new credit accounts for three to six months before your mortgage application, since new applications can affect your credit score and raise questions with lenders.
This article is for informational purposes only and does not constitute financial advice. Always seek independent advice from a qualified mortgage adviser before making financial decisions.
