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Before You ApplyEducational mortgage-readiness preparation

Applications · 8 min read

What checks are done when you apply for a mortgage

In short

There is no single national checklist of mortgage checks. What is fixed is the duty: under FCA rules (MCOB 11.6) a lender must assess whether you can afford the mortgage, must take account of income and expenditure, and must obtain evidence of the income it relies on rather than accept your word for it. Everything else — which documents, covering what period, and how each piece is weighed — is that lender's own policy. This page explains the categories of check so you can prepare the underlying records. It cannot tell you whether you would pass anything.

Who this is for

  • Anyone applying for the first time who wants to know what the process actually involves
  • People who have been asked for something and want to understand the category it falls into
  • Anyone preparing records before booking time with a qualified adviser

Key points

The duty sits on the lender, not on you

MCOB 11.6 places an affordability duty on the lender. It is the lender that must assess and must obtain evidence. Your side of it is being able to produce accurate records when asked.

Identity and legal checks are separate from lending checks

Confirming who you are, and the legal work on the property itself, are different activities from a lender deciding whether to lend. They are often running at the same time, handled by different people, which is why the process can feel like several unrelated requests at once.

Income evidence is checked against a stated figure

MCOB 11.6 requires the lender to obtain evidence of the income taken into account. The practical consequence is that what you state and what your documents show need to match.

Expenditure is part of the assessment

The rules require income and expenditure to be taken into account. That is why questions about committed spending and existing borrowing appear, and why bank statements are commonly requested.

Credit reference data is one input, not the decision

The ICO explains that lenders use credit reference agency information when assessing creditworthiness. It is data held about you, alongside everything else you supply. It is not itself an approval or refusal.

A known future change is relevant

Where a lender is or should be aware of likely future changes to your income or expenditure during the term, MCOB 11.6 requires those to be taken into account. Accurate disclosure of something already agreed is simply accurate information.

The property is assessed too

A lender's interest is in the property as security, not only in you. A valuation instructed for mortgage purposes is a separate exercise from any survey you commission for your own benefit.

Exceptions and things that vary

  • Process and legal terminology differ by jurisdiction. GOV.UK's home-buying guidance applies to England and Wales and says so; Scotland has a different process, including the Home Report and missives.
  • Not every application involves every check, and the order varies between firms.
  • Nothing here describes any individual lender's criteria. We do not publish lender criteria and we do not compare lenders.

How to work through it

  1. Separate the categories in your own notes

    Our suggestion: keep four folders — who you are, what you earn, what you spend and owe, and the property. Most requests fall into one of them, which makes an unexpected request much less alarming.

  2. Make your stated figures match your documents

    Our suggestion: before you state an income figure anywhere, check it against the documents that would evidence it. Inconsistency between the two is the thing you can actually control.

  3. Read your own credit files first

    Our suggestion: obtain your files from more than one credit reference agency and read them. If something is factually wrong, the ICO explains you have the right to have inaccurate personal data corrected.

  4. Write down anything a reader would query

    Our suggestion: for each unusual item in your records, write one factual line explaining it while you still remember. That note is for you, so you can answer clearly if asked.

  5. Ask what will actually be required

    Our suggestion: ask the lender or a suitably qualified FCA-authorised mortgage adviser what evidence they need and covering what period. Only they can answer that, and asking is free.

Illustrative example (not a real case)

Imagine someone who has been asked for three separate things in a week: a passport copy, a recent payslip and an explanation of a transfer. Grouped into categories, these are one identity item, one income item and one expenditure item — routine requests from different parts of the same process, rather than a sign that something has gone wrong. Illustrative only.

Illustrative only. Figures and situations in examples are made up to show a method. They are not typical, not a benchmark and not a prediction of any outcome.

What not to assume

  • Do not assume there is a standard national list of checks. There is not, and no source consulted sets one.
  • Do not assume a request for more information means a problem. It may simply be how that firm evidences a routine point.
  • Do not assume a credit reference file contains a decision. It holds data.
  • Do not assume the checks you experienced before will be the checks you experience next time.
  • Do not assume this page predicts what any lender will decide. It cannot.

Questions for a qualified adviser

We cannot answer these for you, and we do not introduce or recommend advisers. Take them to a suitably qualified FCA-authorised mortgage adviser of your own choosing.

  • Which documents will be needed, and covering what period, for each part of my income?
  • What information will you need about my regular spending and existing commitments?
  • Which valuation will be used for mortgage purposes, and is it separate from any survey I arrange?
  • Is there anything in my situation you would like me to explain in writing up front?

Check my readiness

Eight broad preparation questions. No figures, no personal details, no eligibility result.

Check my readiness

Related reading

A resource that may help you organise the next step

Optional educational preparation resources. Nothing here is mortgage advice, a lender or product recommendation, an eligibility assessment or a prediction of whether an application would be accepted.

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Sources

No statistic, regulator citation or third-party claim is published until its source is verified. Unverified entries are shown as placeholders.

Written by

Before You Apply editorial

Written by the publisher's editorial function, not by a named individual and not by a mortgage adviser. Before You Apply is not FCA authorised.

Reviewed by

Independent reviewer — to be appointed

No independent reviewer has been appointed yet. No review, qualification, FCA status or endorsement is claimed for this content.

  • Last fact-checked 2026-08-30
  • Not yet independently reviewed
  • Next review due 2027-02-28

Disclosure: this guide is educational. Before You Apply receives no payment for mentioning any lender, product or firm, and none are named.

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