What Documents Do I Need for a Mortgage?
Getting your documents together before you apply is one of the most practical things you can do to speed up the mortgage process. Lenders will not make a formal offer until they have verified your identity, your income, and your deposit. Missing a document delays underwriting. Delays cost time, and in a competitive property market, time costs deals.
This guide gives you three separate checklists: one for PAYE employed applicants, one for self-employed applicants (covering sole traders and limited company directors as distinct cases), and one for contractors, including day rate contractors, umbrella company workers, and CIS subcontractors. Most guides treat these as the same. They are not.
Documents Every Applicant Needs
Regardless of how you earn your income, every mortgage application requires the following.
Proof of identity
- Valid passport or photocard driving licence
Proof of address
- Utility bill, council tax statement, or bank statement dated within 3 months
- Some lenders accept documents up to 4 months old; check with your broker
Bank statements
- 3 months personal bank statements as standard
- Some lenders, particularly specialist lenders, require 6 months
- Statements must show salary or income credits, regular outgoings, and any existing debt payments
- Gambling transactions, large unexplained cash deposits, and missed payments will be scrutinised
Deposit evidence
- Savings: bank statements showing the build-up of funds over time
- Gifted deposit: a signed gifted deposit letter from the donor confirming the gift is non-repayable and the donor retains no interest in the property
- Help to Buy ISA or Lifetime ISA: closing statement or transfer confirmation
Anti-money laundering rules require all lenders to verify the source of your deposit. This is non-negotiable and applies to every application regardless of deposit size.
Mortgage Documents Checklist: PAYE Employed
If you are employed and paid through PAYE, your document requirements are the most straightforward. Lenders want to confirm what you earn, that you have been employed consistently, and that your income matches what you have declared on the application.
- Payslips: most recent 3 months. If paid weekly, lenders typically require 13 weeks of payslips. The most recent payslip must usually be dated within 2 months of the application date.
- P60: required if your income includes bonus, commission, or overtime that the lender wants to use toward affordability. Issued annually by your employer before 6 April each year. Also required if your employer name is not clearly shown on your payslips.
- Employment contract or letter: sometimes required if you are in a new role, on probation, or have recently changed jobs. Lenders want to confirm the employment is permanent or ongoing.
If part of your income comes from a second job, rental income, or regular investments, you will need to evidence those separately. Speak to a broker before assuming all income sources will be accepted; lenders vary considerably on this.
Mortgage Documents Checklist: Self-Employed
Self-employed applicants are assessed differently depending on whether they operate as a sole trader or through a limited company. The documents required and the way lenders calculate income differ between these two structures.
Sole traders and business partnerships
Lenders assess your income based on net profit after expenses, as reported to HMRC via your self-assessment tax return.
- SA302 (Tax Calculation): the HMRC document that summarises your declared income and tax for a given year. Most lenders require 2 years. Some specialist lenders will consider 1 year in limited circumstances. Download directly from your HMRC Personal Tax Account online portal.
- Tax Year Overview: a separate HMRC document that confirms the SA302 figures were submitted and any tax owed has been paid. Lenders require both. Available from the same portal as the SA302.
- Business bank statements: 3 months as standard, alongside your personal statements. Lenders use these to cross-reference income and identify business expenditure patterns.
If your income has dropped significantly in the most recent year, lenders will generally use the lower figure or an average. A broker can identify which lenders take the most favourable view of variable or declining income.
Limited company directors
If you operate through a limited company and take a salary plus dividends, lenders calculate your income differently from sole traders. The documents required reflect this.
- SA302 and Tax Year Overview: as above, covering the last 2 years. Your personal self-assessment return is needed even if the company files its own corporation tax return separately.
- Company accounts: 2 to 3 years of finalised accounts prepared by a qualified accountant. These are required in addition to your SA302 and cannot be substituted by management accounts alone.
- Accountant’s certificate: some lenders request a letter from your accountant confirming your income, shareholding percentage, and projected earnings. This is more common when income is variable or the accounts show retained profit that you want included in the assessment.
A growing number of lenders now consider retained profits within the company as part of the income calculation, provided you hold at least 20 to 25% of the company’s shares. This can significantly improve what you can borrow if you have historically left profits in the business rather than drawing them as dividends. Not all lenders offer this, so it is worth working with a broker who knows which ones do.
If you are a limited company director applying for a mortgage, the self-employed first-time buyer and self-employed remortgage pages cover the broader process in more detail.
Mortgage Documents Checklist: Contractors
Contractors are consistently misunderstood by lenders and by the guides written for them. Most content lumps contractors in with the self-employed. From a mortgage lender’s perspective, they are not the same. How you are assessed depends on your specific contracting structure.
Day rate contractors (outside IR35, operating via limited company)
Many lenders will annualise your day rate rather than asking for two years of accounts. This approach significantly improves affordability for contractors who have strong day rates but relatively modest dividend income on paper.
- Current contract: signed contract showing your day rate, start date, and duration
- Contract history: 12 to 24 months of previous contracts demonstrating continuity of work
- CV: some lenders request this to evidence your specialism and employment history
The lender’s income calculation is typically: day rate multiplied by 5 days multiplied by 46 to 48 weeks per year. The exact multiplier varies by lender; some use 46 weeks, others 48. A broker can match you to a lender whose calculation works in your favour.
Umbrella company workers
Umbrella company workers are typically treated as PAYE employees for mortgage purposes, because the umbrella company is technically your employer and deducts tax and national insurance before paying you.
- Payslips: 3 months, issued by the umbrella company
- Employment contract or assignment schedule: confirming the umbrella is your employer, not the end client
- P60: if applicable and income includes bonus or variable elements
Some lenders are cautious about umbrella employment and may request additional evidence that the arrangement is stable. If you have switched umbrella companies recently, flag this to your broker early.
CIS subcontractors
CIS (Construction Industry Scheme) workers have a unique document set that most general mortgage guides do not cover. Under CIS, contractors deduct tax at source before paying subcontractors. This means CIS workers do not typically have SA302s showing large incomes, even when they earn well. Specialist lenders who understand CIS assess income using gross CIS earnings before deductions, which is far more favourable.
- CIS statements: typically 3 months minimum. Some lenders require 6 to 12 months. These show gross income before the CIS deduction and are the primary evidence lenders use.
- Bank statements: 3 to 6 months, to cross-reference income receipts against CIS statements
- HMRC CIS payment verification: some lenders request confirmation that you are registered under CIS and that deductions are being remitted correctly
Using a mainstream lender for a CIS mortgage is rarely the right move. Most mainstream lenders will assess your income net of deductions, which understates what you earn. A broker with CIS experience will direct you to lenders who use gross figures.
What Happens If You Cannot Provide a Document?
Missing documents are common and not always a deal-breaker, but they do need to be handled correctly.
- SA302 not yet issued: if you have filed your tax return but the SA302 is not yet on your HMRC portal, a tax calculation printed from your self-assessment software may be accepted by some lenders alongside confirmation of submission. Verify this with your broker before assuming it will be accepted.
- No P60 from a new employer: a payslip clearly showing year-to-date earnings, alongside an employment contract, is often acceptable as an alternative.
- Accounts not yet finalised: if your most recent year’s accounts are being prepared, some lenders will proceed on 1 year of accounts plus a projection from your accountant. Specialist lenders are more accommodating here than high-street banks.
- Deposit gaps in savings history: if your savings build-up is not visible across 3 months of statements (for example, funds were held in a fixed savings account), provide statements from that account to show the funds have been held throughout.
How to Get Your SA302 from HMRC
Log in to your HMRC Personal Tax Account at gov.uk/personal-tax-account. Navigate to “Self Assessment” and select “Get your SA302 tax calculation”. You can download PDFs for each tax year directly. Print or save the Tax Year Overview separately, as it is a different document on the same portal.
If you filed your return through accountancy software (Xero, FreeAgent, QuickBooks), your accountant can produce a tax calculation from the software. Some lenders accept these; others require the HMRC-sourced version. Know which type your lender needs before submitting.
How Many Bank Statements Do Lenders Need?
The standard is 3 months personal bank statements. Most high-street lenders apply this consistently. Specialist lenders, and lenders assessing more complex income types, often ask for 6 months. If you have had unusual transactions (large cash deposits, gambling activity, or irregular credits), be prepared to explain these in writing. Lenders are not looking for perfection; they are looking for transparency and consistency.
Preparing in Advance
The applicants who move quickest through underwriting are the ones who have their documents ready before the application is submitted, not after. Gather everything before your initial appointment. A good broker will tell you exactly what the specific lender you are applying to will need.
If you are ready to take the next step, book a consultation with Knox Mortgages at calendar.knoxmortgages.com. We will assess your situation, confirm what documents you need, and match you to the right lender from across the whole market.
For more on the application process, see our guide to how long a mortgage application takes and what to expect at each stage.
Frequently Asked Questions
What documents do I need for a mortgage application?
At minimum: proof of identity, proof of address, bank statements (3 months), payslips or tax documents depending on employment type, and deposit evidence. The exact list depends on how you earn your income.
Do I need a P60 for a mortgage?
Not always. P60s are required when bonus, commission, or overtime income forms part of the affordability assessment, or when your employer name is not on your payslips. Your broker will confirm whether your lender needs one.
What is an SA302 and how do I get one?
An SA302 is your HMRC Tax Calculation document, produced from your self-assessment return. Download it from your HMRC Personal Tax Account at gov.uk/personal-tax-account. Lenders typically require 2 years alongside the Tax Year Overview for each year.
Can I get a mortgage without an SA302?
Possibly. Specialist lenders sometimes accept a tax calculation from accountancy software alongside confirmation of submission. Some CIS lenders do not require an SA302 at all and rely on CIS statements instead. This depends entirely on the lender and your employment structure.
What documents do CIS workers need for a mortgage?
Primarily CIS statements covering 3 to 12 months, plus bank statements to corroborate income. CIS workers should use specialist lenders who assess income on gross figures before deductions, not mainstream lenders who will understate what you earn.
What proof of income do I need if I am self-employed?
SA302 and Tax Year Overview for the last 2 years, plus 3 months business bank statements. Limited company directors also need company accounts for 2 to 3 years. Some lenders will consider retained profits if you hold 20 to 25% or more of the company.
How many months of bank statements do I need for a mortgage?
Three months is the standard for most lenders. Specialist lenders and those assessing complex income types often ask for 6 months. Self-employed applicants typically need both personal and business bank statements.
Do I need a solicitor’s details before applying?
Not at the initial application stage. You will need to appoint a conveyancing solicitor once a mortgage offer is issued, not before. Some lenders ask for your intended solicitor’s details as part of the process; others do not require this until later.
Your home may be repossessed if you don’t keep up repayments on your mortgage.
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