Being self-employed does not make a mortgage harder to get. What it changes is how much the choice of lender matters. Two lenders can look at exactly the same accounts and arrive at wildly different figures, because they use different methods to work out your income. Understanding which method suits your situation is the difference between being told you can borrow £180,000 and being told you can borrow £280,000.
Key takeaway: You do not always need two or three years of accounts. Lenders assess your net profit rather than your turnover, and how they treat it depends on whether your profits have gone up or down. If you work on a contract or day rate, you may not be assessed on your accounts at all.
[[stats: 1 Year = Minimum accounts with some lenders | 4.5-6x = Income available depending on lender | 5% = Minimum deposit available | Whole of market = Independent lender access | Exclusive rates = Via our lender network | National = Coverage across the UK]]
Why do lenders treat self-employed applicants differently?
An employed applicant hands over three payslips and the lender has its answer. There is a contract, a fixed salary and an employer standing behind it.
When you work for yourself there is no such shortcut. Your income is whatever your business produced last year, and the year before that, and lenders take a longer view to satisfy themselves it is sustainable. That is the whole of the difference. It is not that lenders dislike self-employed applicants, it is that they need a different way to measure the same thing.
The complication is that they have not all agreed on what that way should be, and the gap between the most and least generous approach is large.
How do lenders calculate self-employed income?
Lenders work from your net profit, not your turnover. That is the figure left after business expenses, and it is the number on your SA302 tax calculation.
What they do with it depends on the direction your profits are moving.
[[table: Your situation | How lenders typically respond ;; Profits have increased or stayed level | Most lenders average your last two years of net profit ;; Latest year is lower than the year before | Lenders generally use the latest year alone rather than averaging, since the average would overstate your current position ;; You only have one year of accounts | Most lenders want two full years, but a smaller group can work from a single year]]
That second row surprises a lot of people, who assume a two-year average will rescue a weaker recent year. It does not. NatWest's published criteria states it plainly: where income has remained the same or increased they use an average, and where income has decreased they use the latest year. Most lenders take the same approach.
Take a sole trader with £50,000 net profit two years ago and £60,000 last year. Because profits rose, most lenders will average and assess £55,000. A lender willing to use the latest year alone would assess £60,000. At 4.5 times income, that is a difference of roughly £22,500 in borrowing from identical accounts.
Good to know: A drop in profit is not automatically a problem. Where the fall has a clear explanation, such as a one-off equipment purchase, several lenders will accept a written letter from your accountant setting out why. NatWest specifically asks for this where a company shows less profit than usual due to a one-off acquisition.
How long do you need to have been self-employed?
Most mainstream lenders want a minimum of two full years of trading. NatWest, for example, requires two full years with trading figures covering that period.
That is not the whole market though. A smaller group of lenders will work from a single year of accounts, which matters if you have recently gone out on your own or moved from sole trader to limited company. You will typically need at least one year of tax calculations and tax year overviews, plus limited company accounts if you trade through a company, and your accounts generally need to be no more than 21 months old at the point of application.
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If you are a limited company director
Limited company directors are a distinct case, and often the most undersold of all. If you take a small salary and modest dividends for tax efficiency, many lenders will assess you only on what you have drawn. NatWest, for instance, assesses directors holding 20% or more of a company as self-employed, uses the last two years of salary and dividends, and explicitly will not accept income from retained profit or directors' loans.
Other lenders take a very different view and will use your salary plus your share of company profit, add pension contributions back in, and work from your latest year alone. That single difference in approach can double what you are offered.
Because there is a lot to it, we have covered it separately in our complete guide to mortgages for company directors, which includes the assessment methods, what happens when profits reduce, and what to do if you have just moved from sole trader to limited company.
If you work on a contract or day rate
This is the part most self-employed people do not know about, and it is frequently the most valuable route available.
If you work on contract, several lenders will ignore your accounts entirely and assess you on the value of your contract instead, treating the income much as they would an employee's salary. It applies whether you trade as a sole trader or through a limited company, and it typically produces a considerably higher assessable figure than a two-year average of net profit would.
It commonly covers IT contractors, other professional day-rate contractors, CIS subcontractors, and dentists and locums who are assessed in a similar way using their monthly invoices or remittances. Thresholds vary widely between lenders, and some apply no minimum income at all, so a rate that rules you out with one lender may be perfectly acceptable to another.
Because it is a subject in its own right, we have covered it in full in our complete guide to contractor mortgages, which compares how six lenders calculate contract income, what track record each one wants, and how gaps between contracts are treated.
The mechanics differ by lender. Two examples, both taken from the lenders' own published criteria:
[[lenders: Skipton Building Society | Uses daily contract rate x 5 x 46 weeks, whether you trade as a sole trader or through a limited company. Wants two years' experience in the field and 12 months' contract history. Gaps of more than four weeks in the last year are pro-rated. ;; Accord Mortgages | Minimum £300 per day or £50,000 a year, with a minimum six month track record of contract work and a maximum of 46 weeks of income used from the current contract. Gaps of up to eight weeks are treated as standard.]]
Skipton applies one condition worth knowing about: if you contract through a limited company, the day rate calculation is only available where you are the sole shareholder, or share it with a spouse or partner who is also on the mortgage application. Bring in any other shareholder and the case reverts to standard self-employed assessment.
Dentists and locums
Locum medical professionals, including dentists and bank nurses, are assessed on their invoices rather than their accounts. Skipton uses an average of 12 months of gross income taken from payslips, invoices or an employer summary, and requires that any UDA (Unit of Dental Activity) deductions are accounted for. Weekly payslips are not accepted as evidence. Our guide to mortgages for associate dentists covers this in more detail.
CIS subcontractors
CIS subcontractors have their own route again. Skipton will work from either a 12 month gross average of invoices, less materials, or the net profit figure from your latest SA302, whichever produces the better outcome for your circumstances. Twelve months of weekly remittance slips are specifically not accepted. Our guide to CIS contractor mortgages explains how the different lender approaches compare and why timing your application can matter.
Lender criteria described here were correct at the time of writing and can change. A mortgage broker at Quanstrom Financial will confirm current criteria for your circumstances.
Try it with your own figures
If you invoice monthly, enter your average monthly invoices over whichever periods you have available. The calculator annualises them and shows indicative borrowing at 4.5 and 6 times income for each.
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What documents will you need?
- Tax calculations (SA302s) and tax year overviews, one to two years depending on the lender
- Full accounts prepared by a qualified accountant, if you trade through a limited company
- Three months of business bank statements
- Three months of personal bank statements
- Proof of identity and proof of deposit
- If you work on contract, your current contract and usually the previous one, plus a CV where the lender wants evidence of experience in the field
If you are unsure how to get your SA302s and tax year overviews from HMRC, our guide on how to get your tax calculation and tax year overview walks through it.
Good to know: Lenders are specific about who prepares your accounts. NatWest, for example, publishes a list of acceptable professional bodies, including chartered and certified accountants and members of the Institute of Financial Accountants and the Chartered Institute of Taxation. If your accounts are prepared by someone without a recognised qualification, that alone can rule out lenders, so it is worth checking before you apply.
How much can you borrow, and what deposit do you need?
Self-employed applicants are not penalised on either count as often as people expect. Income multiples run broadly in line with employed applicants, with most lenders working around 4.5 times income and higher multiples available in the right circumstances. Deposits typically start from 5% of the property value, and some lenders can consider 0% deposit options subject to eligibility.
The variable that actually moves the needle is which income figure the multiple is applied to. Our guide on how much you can borrow for a mortgage in 2026 covers income multiples across different income types in more depth.
How to strengthen your application
Get your accounts done early
Do not leave your accounts until the last moment, particularly if your latest year is your strongest. Filed, finalised accounts give you access to lenders who will use that year, and they close off the 21-month problem before it arises.
Keep business and personal spending separate
Underwriters look closely at self-employed applications. A clean separation between business and personal accounts makes the file easier to assess and removes questions before they get asked.
Protect your credit profile
Late payments, unfiled tax returns and heavy use of short-term borrowing all narrow your options. Our guide to credit scoring explains what lenders actually look at.
Time your application deliberately
If your next set of accounts will be materially stronger, waiting for them can be worth more than anything else you do. If you know the coming year will be weaker, applying on the current figures may serve you better. It is worth a conversation with a mortgage broker at Quanstrom Financial before you decide, because the sequencing is hard to undo once an application is submitted.
Buy to let as a self-employed applicant
If you are investing in rental property rather than buying a home to live in, the assessment works differently again. Buy to let lending is primarily based on the rental income the property is expected to produce, stress tested against the mortgage payments, rather than on your personal earnings. Many lenders do still apply a minimum income requirement, but the emphasis shifts away from your accounts.
That often makes buy to let more straightforward for self-employed applicants than a residential purchase. Our buy to let mortgage page covers how it works. Some buy to let mortgages are not regulated by the Financial Conduct Authority.
Frequently asked questions
How many years of accounts do I need to get a self-employed mortgage?
Most mainstream lenders want two full years of trading. A smaller group will work from one year, though the choice of lenders is narrower. Lenders offering one-year criteria will usually want to see the business trading well and may consider your background in the same line of work before you started out.
Do lenders look at my turnover or my profit?
Your net profit, which is the figure after business expenses have been deducted. Turnover is not what you are assessed on. The exception is contract and day-rate income, where a lender may work from the contract value or gross invoices instead of your accounts.
My profits went down last year. Can I still get a mortgage?
Yes, but you should expect to be assessed on the lower, most recent year rather than a two-year average. Most lenders only average when income has stayed level or increased. Where the fall has a clear one-off cause, a letter of explanation from your accountant can help.
I work on contract. Am I better off with a contractor mortgage?
Very possibly. Contract income assessed on its annualised value usually produces a much higher figure than two years of averaged net profit. Our contractor mortgage guide explains how the calculation works and which lenders offer it.
Do I need a bigger deposit because I am self-employed?
Not automatically. Deposits typically start from 5% of the property value for self-employed applicants just as they do for employed ones, and some lenders can consider 0% deposit options subject to eligibility.
Is it different if I am a sole trader rather than a limited company director?
Yes. A sole trader is assessed on net profit from their tax calculations. A limited company director can be assessed on salary plus dividends drawn, or on salary plus their share of company profit, which usually produces a much higher figure for a tax-efficient director. Our company directors guide covers that in full.
How soon after going self-employed can I apply?
Once you have a full year of trading and your first set of accounts or tax calculations. If you have recently moved from employment into self-employment doing the same work, that background can help, so it is worth raising it rather than assuming you have to wait.
Can I get a mortgage if I have only just moved from sole trader to a limited company?
Often yes. Most lenders treat incorporation as the start of a brand new business, but some will consider it where the business is a genuine continuation of the same trade. NatWest states it can consider these cases on a case-by-case basis, and other lenders will average your earnings across the change where the business and shareholding are unchanged.
Do I need a specialist lender?
Not necessarily a specialist, but you do need the right one. Plenty of mainstream lenders assess self-employed income perfectly well; the issue is that they use different methods, and only some of them will suit your particular circumstances. That is the value of going through a whole-of-market broker rather than approaching lenders one at a time.
Written by Toby Quanstrom CeMAP, Director at Quanstrom Financial, a whole-of-market mortgage broker based in Eastbourne, East Sussex, specialising in mortgages for self-employed professionals and business owners.
This article is general information only and does not constitute personal advice. What you may be able to borrow depends on your individual circumstances and lender criteria. Calculator figures are illustrations only and are not a mortgage offer.
Your home may be repossessed if you do not keep up repayments on your mortgage.
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