Self-Employed Home Mover Mortgages

1 Step 1

Self-Employed Home Mover Mortgages

Moving home when you are self-employed involves the same steps as any other home move, but with additional considerations around how your income is assessed. Whether you are upsizing, downsizing, or relocating, lenders will reassess your affordability from scratch unless you are simply porting your existing mortgage. Understanding how this process works before you start looking at properties puts you in a much stronger position.

At Knox Mortgages, we help self-employed home movers navigate income assessment, lender selection, and timing so the process runs as smoothly as possible.

Porting Your Existing Mortgage vs a New Application

When you move home, you have two main options with your mortgage: port it or take out a new one.

Porting Your Mortgage

Porting means transferring your current mortgage deal to your new property. This can be attractive if you are on a competitive fixed rate that you do not want to lose, or if you want to avoid early repayment charges (ERCs) on your current deal.

However, porting is not automatic. Your lender will reassess your affordability, which means providing up-to-date income evidence. If your self-employed income has changed since you took out the original mortgage, this reassessment could result in a lower borrowing amount or even a decline. Porting also locks you into your current lender, which may not offer the best deal for your new purchase.

New Mortgage Application

Applying for a completely new mortgage gives you access to the full market. This is often the better option if your current deal is coming to an end, if you need to borrow more than your current lender will allow, or if rates elsewhere are more competitive. The trade-off is that you will go through a full application and income assessment from the start.

Combination Approach

If you need to borrow more than your current mortgage balance (because your new property costs more), you can sometimes port your existing deal and take out a further advance or a separate product for the additional borrowing. This keeps your current rate on the existing balance while only the new portion is assessed at current rates.

Income Assessment When Moving Home

Whether you port or apply fresh, your self-employed income will be assessed. The method depends on your business structure.

Sole Traders and Partnerships

Lenders use your net profit from your SA302 tax calculations. Most will average your last two years. If your latest year is higher, some lenders will use just the most recent figure, which increases your borrowing capacity.

Limited Company Directors

Your income is typically calculated as salary plus dividends declared on your personal tax return. Some lenders also factor in retained profits or your share of company net profit, which can make a significant difference to how much you can borrow.

Contractors

Lenders who specialise in contractor mortgages may annualise your day rate (day rate multiplied by 5 days, multiplied by 46 to 48 weeks). This method often produces a higher income figure than looking at salary and dividends alone.

How Profit Dips Affect Your Application

If your self-employed income has dipped since you took out your current mortgage, this is one of the biggest challenges when moving home.

Lenders who average two years of income will factor the lower year into their calculation. If the dip is significant, your maximum borrowing could be substantially less than what you currently owe. This does not necessarily mean you cannot move, but it does mean you need to plan carefully.

Options when income has dipped:

Wait for recovery. If your income has bounced back in the most recent year, some lenders will use the latest figure alone, ignoring the dip.
Provide context. A letter from your accountant explaining that a dip was caused by a one-off event (such as investing in equipment or a temporary loss of a client) can persuade some underwriters to take a more favourable view.
Use a specialist lender. Some lenders are more flexible with income fluctuations. A broker can identify which ones will work with your specific income pattern.
Adjust your budget. If your borrowing capacity is lower than expected, you may need to put more equity from your current property toward the deposit to reduce the loan amount.

Timing Your Move Around the Tax Year

Timing matters for self-employed home movers more than most people realise.

Your SA302 and tax year overview are the primary documents lenders use to verify your income. The tax year runs from 6 April to 5 April. If you apply for a mortgage in the months immediately after the tax year ends (say, May or June), your most recent tax return may not yet be filed and processed by HMRC.

This means the lender will use your previous year’s figures, which could be 12 to 18 months old. If your income has grown, this costs you borrowing power.

Practical advice on timing:

File your self-assessment tax return as early as possible after 6 April. Do not wait until January.
Ask your accountant to prepare your SA302 and tax year overview immediately after filing.
If your latest year’s income is significantly higher, consider delaying your application by a few weeks until the new figures are available.
If you are a limited company director, ensure your company accounts are filed and up to date, as lenders may request these in addition to personal tax returns.

Using Equity From Your Current Property

One significant advantage self-employed home movers have over first-time buyers is existing equity. If your current property has increased in value or you have paid down a meaningful amount of your mortgage, this equity forms your deposit for the next purchase.

A larger deposit means a lower loan-to-value (LTV) ratio, which unlocks better interest rates and gives lenders more confidence in your application. For self-employed borrowers, this can offset concerns about income volatility.

For example, if your current property is worth 300,000 pounds and your remaining mortgage is 180,000 pounds, you have 120,000 pounds in equity. After selling costs and stamp duty on your new purchase, a substantial portion of that equity goes toward your next deposit.

Stamp Duty Considerations for Home Movers

As of April 2025, stamp duty land tax (SDLT) in England and Northern Ireland applies at the following rates for home movers (not first-time buyers or additional properties):

0% on the first 125,000 pounds
2% on the portion from 125,001 to 250,000 pounds
5% on the portion from 250,001 to 925,000 pounds
10% on the portion from 925,001 to 1,500,000 pounds
12% on any amount above 1,500,000 pounds

If you are buying before selling (meaning you will temporarily own two properties), you may need to pay the additional property surcharge of 5% upfront. This is refundable if you sell your original home within 36 months of purchasing the new one. Factor this into your cash flow planning, particularly if your self-employed income fluctuates.

How a Broker Helps Self-Employed Home Movers

Self-employed home movers benefit from broker advice more than almost any other group of borrowers. Here is why.

Lender matching. Different lenders calculate self-employed income differently. A broker who knows the criteria across the full market can match your income profile to the lender that will offer you the highest borrowing amount at the best rate.
Porting vs switching analysis. A broker can compare what you would get by porting your current deal against what is available on the open market, factoring in ERCs, rate differences, and product features.
Managing income complications. If your income has dipped, if you recently changed from sole trader to limited company, or if you have a complex income structure, a broker can present your application in the way most likely to succeed.
Speed. Self-employed applications often require more back-and-forth with underwriters. A broker who has a direct relationship with lender underwriting teams can resolve queries faster and keep your purchase on track.

Frequently Asked Questions

Can I move home if my self-employed income has dropped?

Yes, but your maximum borrowing will likely be lower. If you have substantial equity in your current property, you can offset this by putting down a larger deposit. A broker can also identify lenders who take a more flexible view of income dips.

Do I need to reapply if I am porting my mortgage?

Yes. Even when porting, your lender will reassess your income and affordability. You will need to provide up-to-date SA302s and supporting documentation.

What happens if I own two properties temporarily during the move?

You will need to pay the 5% additional property stamp duty surcharge on completion of your new purchase. You can claim this back within 36 months of buying the new property, provided you sell your original home within that period.

Should I file my tax return early before applying?

If your latest year’s income is higher than the previous year, filing early ensures lenders can use the most favourable figures. This can make a meaningful difference to your borrowing capacity.

Can I use a self-employed mortgage to buy a more expensive property?

Your maximum borrowing is based on your income (typically 4 to 4.5 times your assessed income) and your deposit. If your equity and income support a larger mortgage, there is no restriction on buying a more expensive property.

How long does the process take for a self-employed home mover?

From application to completion, a typical home move takes 8 to 14 weeks. For self-employed applicants, allowing extra time for document preparation and underwriting queries is sensible. Having all your paperwork ready before you apply can shorten this significantly.

Speak to a Mortgage Adviser

If you have questions or want to discuss your options, book a free discovery call below.

Book a Free Discovery Call

Your home may be repossessed if you don’t keep up repayments on your mortgage.

Knox Mortgages is a trading style of Fort Advice Bureau which is regulated and authorised by the FCA to conduct Mortgage and Protection business, FRN: 972730

Self-Employed Home Mover Mortgages