Lenders typically read three months of bank statements line by line, and your credit file going back six years. They are not looking for perfection — they are looking for evidence that you manage money predictably. Most declines come from a handful of specific things, and almost all of them can be fixed with a few months' notice.
Here is what causes problems, in roughly the order lenders care about, and what to do about each.
Your credit file shows missed payments on loans, credit cards, mobile contracts and utilities. A single late payment two years ago is rarely fatal. A pattern of them, or a default or County Court Judgment, is a different matter.
Defaults and CCJs stay on your file for six years from the date they were registered, whether or not you have since paid them off — though a satisfied default looks considerably better than an unsatisfied one.
What to do: get your credit report before you apply, not after you are declined. Check it for errors, which are common, and dispute anything wrong directly with the credit reference agency — that is free. If you have genuine adverse credit, it does not rule you out: specialist lenders price for it, and the right one depends on what the problem is and how old it is.
A word of caution on "credit repair" companies. Correcting errors on your file costs nothing and you can do it yourself. No company can lawfully remove accurate adverse information, whatever it advertises. If you are struggling with debt, free and impartial help is available from StepChange, Citizens Advice and MoneyHelper.
Large or irregular credits that do not match your salary will be queried. This is anti-money laundering work, not suspicion of you personally, and lenders are obliged to do it.
What to do: be able to evidence anything substantial. A gifted deposit needs a letter from the giver confirming it is a gift rather than a loan, that they retain no interest in the property, and proof of where their money came from. Sort this at the start — it is one of the most common causes of delay close to exchange.
Several hard credit searches in a short period suggest someone who needs credit rather than someone who manages it. It is one of the easiest own goals to avoid.
What to do: no new cards, loans, car finance or bank account switches in the months before you apply. If you are shopping around for an Agreement in Principle, ask whether the lender uses a soft or a hard search — most use soft, but not all, and several hard searches collected while browsing will count against you.
This is the one people most often do not realise matters. Occasional small amounts are usually ignored. Regular gambling, or amounts that are large relative to your income, is a genuine problem — and underwriters do look for it.
What to do: lenders see the three months before your application, so if this applies to you, time your application accordingly. Be aware that gambling funded from an overdraft reads far worse than gambling from surplus income.
A payday loan is treated very differently from an ordinary loan. Many lenders will decline an applicant who has used one recently, even if it was repaid on time and in full, because the product itself signals cash-flow stress. The look-back period varies by lender — some care about the last 12 months, others considerably longer.
What to do: if you have used one, say so upfront. There are lenders who take a more measured view, but you need to be with one of them from the start rather than discovering the problem at underwriting.
Klarna, Clearpay and similar now appear routinely on bank statements, and some providers report to credit reference agencies. Lenders increasingly treat regular buy-now-pay-later use as a credit commitment — which means it both reduces affordability and, if there are missed payments, looks like any other arrears.
What to do: clear and stop using them a few months before applying, and declare any outstanding balances. Do not assume they are invisible.
Occasional use is not a problem. Being overdrawn every month before payday, or sitting at your limit persistently, tells a lender your outgoings exceed your income.
What to do: aim to be out of your overdraft for the three months before applying. Unarranged overdraft charges are worse than arranged ones.
Lenders see your bank statements. If you declare no credit commitments and the statements show car finance, a loan repayment or child maintenance going out, the discrepancy is a far bigger problem than the commitment itself would have been.
What to do: declare everything. Accuracy matters more than the numbers looking good.
Variable income is not a red flag in itself — it just needs the right lender. Problems arise when the documentation does not support the figure claimed.
What to do: if you are self-employed, or your income includes significant bonus, commission or overtime, work out what each lender will actually assess your income as before applying. Lenders differ enormously here, and the gap between the most and least generous can be tens of thousands of pounds of borrowing.
A job change between your Agreement in Principle and your full application can unravel it, particularly if there is a probation period.
What to do: if a move is coming, tell your adviser before it happens rather than after. Some lenders are relaxed about probation; others will not lend at all until it ends.
None of this means your finances need to be spotless. Lenders are assessing risk, not awarding marks. What they want is a picture that is consistent, explainable and stable — income that matches what you have declared, outgoings that leave room for the mortgage, and nothing that needs an awkward explanation.
The practical point is that almost everything above improves with three to six months of notice. That is the single strongest argument for talking to someone before you start viewing rather than after you have had an offer accepted.
How many months of bank statements will a lender want?
Usually three, though some ask for more, and some will want statements for every account you hold.
How far back does a lender look at my credit file?
Six years, which is how long defaults, CCJs and most adverse entries remain on file.
Will gambling stop me getting a mortgage?
Not necessarily. Occasional small amounts are usually overlooked. Regular gambling, or amounts large relative to your income, is likely to count against you — particularly if funded from an overdraft.
Does using Klarna affect a mortgage application?
It can. Buy-now-pay-later transactions show on your bank statements, some providers report to credit reference agencies, and lenders increasingly treat regular use as a credit commitment affecting affordability.
Can I get a mortgage after a payday loan?
Often yes, but your choice of lender narrows considerably. Many decline recent payday loan use even where it was repaid on time, so it is worth going to the right lender first rather than collecting declines.
Will checking my own credit report hurt my score?
No. Checking your own file is a soft search and is not visible to lenders.
Should I pay off all my debts before applying?
Not automatically. Clearing a credit card helps affordability, but emptying your savings to do it can leave you short of deposit and reserves. It is worth working out which is worth more in your case before you act.
A declined application costs you a hard credit search and weeks you may not have. Getting the picture straight before you apply is cheaper than fixing it afterwards.
We are an independent, whole-of-market mortgage broker at Beehive Works in Sheffield, authorised and regulated by the Financial Conduct Authority (FRN 650114). We will look at your situation honestly, tell you what a lender will see, and if the answer is that you would be better applying in four months than today, we will say so.
Work out what you could borrow with our borrowing calculator, or read our first-time buyer guide. Your initial consultations and discussions with your adviser are free, and our fees are set out in full before you commit to anything.
Call 0114 303 1031, email info@friendscapital.co.uk, or get in touch through the website.
Your home may be repossessed if you do not keep up repayments on your mortgage.