Getting Mortgage Ready

One small fix before you apply can add £20,000 to £50,000 of borrowing. This guide covers the four things every buyer should do 1-6 months before applying: check your credit file, hit a deposit threshold, clear the right debts, and gather your documents.

If you're not planning to buy for a few months — great. This is the stage that pays back the most.

Check Your Affordability — Free

Why Mortgage Readiness Matters

Every UK lender runs your application through an affordability calculator. The output depends on four things they can see: your credit profile, your deposit, your outgoings, and your income. You can influence three of those directly before you apply.

Getting ready isn't about gaming the system — it's about presenting the version of your finances that reflects who you actually are once your short-term debts are paid off and your deposit is where you've planned it to be. Lenders make decisions on today's snapshot; make sure the snapshot they see is the best one you can offer.

Step 1: Check Your Credit File (Do This First)

This is the single most important thing you can do before applying.

There are three UK credit reference agencies: Experian, Equifax, and TransUnion. Different lenders check different agencies — some check all three, some check one. A problem on one agency's report (an error, a missed payment, an address mismatch) that you don't know about can stop an application cold without you ever finding out why.

Before you apply, you should know exactly what each of the three agencies is reporting about you.

The quickest way: a multi-agency report

The fastest way to check all three is a service that combines them into one report. CheckMyFile is the only UK service that pulls data from all three major agencies in a single report. It offers a 30-day free trial, which is enough time to review the report, raise any disputes, and cancel if you don't need ongoing monitoring.

See your report with CheckMyFile →

We may earn a small commission if you sign up via this link, at no cost to you. We recommend CheckMyFile because it's the only UK service that covers all three agencies in one report, which matches what lenders actually check.

What to look for on your report

Errors — accounts you don't recognise, addresses you never lived at, incorrect balances, payments marked as missed that you actually made. Every error gets disputed directly with the agency; corrections typically take 30 days.
Closed accounts showing as open — a common issue with old credit cards. Close them properly.
Hard searches — lenders see multiple recent hard searches as a risk flag. If you've applied for several credit products in the last 6 months, wait before applying for your mortgage.
Payment history — one missed payment from 4 years ago is usually fine; a pattern of recent late payments will hurt. The report shows exactly what a lender will see.
Credit utilisation — if you're using more than 30% of your total credit card limit, paying balances down before applying usually helps.
Electoral roll — being registered at your current address is a significant positive signal. If you've moved recently and forgot to update the roll, do it now.

What to fix before applying

In priority order: correct errors (raises your score fast), reduce credit utilisation below 30% (shows the lender you're not dependent on credit), make sure you're on the electoral roll, and close any dormant accounts you're not using.

Step 2: Hit a Deposit Threshold

Deposit size affects two things: what rate you'll get (higher deposit = lower rate) and what income multiple some lenders will apply (higher deposit = higher multiple at some).

The key thresholds: 5%, 10%, 15%, 25%, 40%. Each one you cross unlocks different lender tiers, different rates, or different products.

A worked example on a £250,000 property:

Deposit	LTV	Rate tier
£12,500	95%	Highest rates; limited lender choice
£25,000	90%	Better rates; wider lender choice
£37,500	85%	Meaningfully lower rates; most lenders available
£62,500	75%	Best rates for most applicants; full product range
£100,000	60%	Lowest rates available

Sometimes waiting 3 months to save another £5,000 and cross a threshold saves you far more in interest than the 3-month delay costs you.

Deposit Savings Calculator →

How Deposit Size Affects Your Borrowing →

Step 3: Clear the Right Debts

Lenders reduce your maximum borrowing based on monthly debt commitments. Clearing the right debt before you apply can meaningfully increase your offer.

The biggest wins are short-term debts with high monthly payments relative to the outstanding balance.

Debt type	Impact on borrowing
Credit card balance (not cleared monthly)	3% of balance used as monthly commitment; £5,000 balance ≈ £15,000 less borrowing
Car finance (PCP/HP)	Monthly payment deducted pound-for-pound; £300/mo PCP = £18,000-£24,000 less borrowing
Personal loan	Monthly payment deducted; similar impact to car finance
Overdraft (regularly used)	Limit treated as commitment; £500 overdraft can cost £3,000 of borrowing
Buy Now Pay Later (Klarna, Clearpay)	Increasingly flagged on credit files and affordability checks

Best candidates to clear: a car finance agreement with under 12 months left, small credit card balances sitting there for no reason, or a personal loan near the end of its term.

Don't clear: mortgages you already have (remortgaging is separate), student loans (most lenders factor in repayment differently), or long-term loans where the monthly payment is genuinely manageable.

Full Guide: Mortgage Affordability With Debt →

Step 4: Gather Your Documents

Having your paperwork ready before you apply saves 1–2 weeks from the application process and shows lenders you're organised.

What every applicant needs:

Photo ID (passport or driving licence)
Proof of address — utility bill, council tax, or bank statement dated within 3 months
Last 3 months' bank statements (main current account)
Deposit evidence — savings statement, gift letter if applicable, or sale proceeds

If you're employed:

Last 3 months' payslips
Latest P60
Employment contract if you've been in role under 12 months

If you're self-employed:

Last 2 years' SA302s and tax year overviews (via HMRC)
Last 2 years' business accounts prepared by an accountant
Last 3 months' business bank statements

If you're a contractor:

Current contract (and previous if relevant)
Last 3 months' invoices and bank statements showing payments
CV or LinkedIn showing contract history

For bonus / commission / overtime:

Last 2 years' P60s showing the bonus/commission

Full Document Checklist →

Your 1, 3, and 6 Month Plans

1 month out (you're nearly ready):

Run your affordability check, confirm your top 3 lenders
Order your CheckMyFile report, raise any disputes
Gather all documents, have them ready on your phone
Stop applying for any new credit

3 months out (realistic starting point for most buyers):

Review credit file, fix errors (allow 30 days for corrections)
Set deposit savings target, automate transfers
Identify any debts to clear, start chipping at them
Reduce spending showing on bank statements — lenders review 3 months

6 months out (ideal window):

All of the above, plus:
Register on electoral roll at current address
Close dormant credit cards (but keep one or two older ones open to show credit history depth)
If changing jobs, do it now — most lenders want 3+ months in current role
Start building a mortgage-ready spending pattern (no gambling, no payday loans, no returned direct debits)

What Lenders See When They Review Your Bank Statements

This is the part most buyers miss. Lenders don't just look at income and outgoings — they read your last 3 months' bank statements line by line. Common red flags:

Gambling transactions — even small ones. Matched betting and spread betting are particularly flagged.
Payday loan repayments — even one is a major negative.
Returned direct debits — suggests you can't reliably cover outgoings.
Overdraft usage — regular dips into overdraft suggests you're living beyond your means.
Large unexplained credits — lenders will ask where they came from. Deposit gifts need a gift letter.

If your last 3 months show any of these, wait until you have 3 clean months before applying.

Frequently Asked Questions

How long does it take to get mortgage ready?

For most buyers, 3 months is enough time to check your credit file, clear small debts, hit a deposit threshold, and present 3 clean bank statements. Buyers with credit file issues or significant debt to clear often need 6 months.

Does checking my credit file affect my score?

No. Checking your own file is a soft search — it's invisible to lenders and has no effect on your score. You can check as often as you like.

Should I close old credit cards before applying?

Mixed advice here. Closing dormant accounts reduces clutter but also reduces your total available credit (which can push up utilisation). General rule: close cards you've had under 2 years; keep older ones open with zero balance for credit history depth.

Will switching jobs affect my mortgage application?

Most lenders want 3+ months in current role, and some want 6+ months. If you can, avoid changing jobs in the 6 months before applying. If you've already switched, a letter from your new employer confirming your role and salary helps.

Does Buy Now Pay Later (Klarna) affect my mortgage?

Yes, increasingly. BNPL now appears on credit files from Experian, and some lenders treat it like a credit commitment. Clearing BNPL balances before applying is worth it.

Can I get a mortgage with a poor credit file?

Yes — specialist adverse-credit lenders consider applicants with CCJs, defaults, missed payments, and more recent events than high street lenders. See our adverse credit hub for lender-specific criteria.

Written by a CeMAP qualified mortgage advisor

Last updated: April 2026