Home Improvement Interactive Project Cost Estimator

If you are self-employed and want to borrow against your home, this classifier works out how lenders are likely to assess your income - based on your trading structure, your accounts, and how different lenders treat each income type. All figures are illustrative.

At a Glance

  • Select your trading structure – sole trader, limited company director, partnership, or CIS/contractor – and enter your income figures. The classifier calculates the income figure lenders are most likely to use – how this classifier works
  • The usable income figure is often lower than your actual earnings – lenders use specific figures from your accounts rather than your gross income, which is why this matters before you approach a lender – what usable income means
  • The three indicative borrowing ranges show what different lenders might advance at conservative, standard, and flexible income multiples – equity and LTV also determine the actual limit – how the borrowing ranges are calculated
  • Limited company directors have the most variation – some lenders use salary and dividends only, others include a share of net profit. The classifier shows the difference – limited company director income
  • This tool covers income assessment only – use the eligibility checker and LTV calculator alongside it to build the full picture before approaching a lender – what else affects how much I can borrow?

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Home Improvement Interactive Project Cost Estimator

Home improvement project cost estimator

Add your planned projects to build a realistic budget — with contingency and indicative borrowing guidance. All figures are illustrative.

1
Where is the property?
National average
2
Add a project to your estimate
Typical cost range for this project

Costs shown are illustrative typical ranges after applying your regional factor. Always get 2–3 quotes before committing to a project.

3
Your project estimate
No projects added yet — use the configurator above to add your first project.

Why self-employed income assessment is different

Lenders cannot use gross income

An employed borrower’s income is straightforward to verify – a payslip shows exactly what lands in their bank account each month. For self-employed borrowers, gross turnover, business income, and personal income are all different things. Lenders need a figure that represents sustainable, taxable personal income – and the way they get to that figure depends on how you trade.

The figure lenders use varies by trading structure

Sole traders and partners are typically assessed on their net profit after allowable expenses, taken from their SA302 or tax return. Limited company directors are assessed on salary plus dividends, and sometimes on a share of retained company profit. CIS contractors and day-rate workers may be assessed either on an annualised day rate or on SA302 net profit, depending on the lender. The same actual earnings can produce very different usable income figures under different assessment methods.

Trading history affects which lenders will consider you

Most lenders require at least two years of accounts or SA302 tax returns. Some will consider one year of trading with the right profile, though fewer products are available. Three or more years of accounts produces the strongest and most consistent usable income figure and opens the widest range of lenders. Gaps in trading history or a recent switch in trading structure can complicate the assessment.

Income variation between years affects the calculation

Lenders typically use the lower of the two most recent years, or an average of two or three years, rather than the most recent figure alone. A strong most recent year is positive, but a weaker prior year pulls the usable income figure down. The classifier shows the income figure that would result from each common calculation method so you can see which lenders’ approaches work best for your specific pattern of earnings.

How this classifier works

1

Select your trading structure

Choose from sole trader, limited company director, partnership, or CIS/contractor. Each structure has a different income assessment approach, and the classifier adjusts the input fields and calculation method accordingly.

2

Enter your income figures

Enter the relevant figures from your accounts or tax returns – net profit for sole traders and partners, salary and dividends for limited company directors, day rate and weeks worked for CIS/contractors. Use figures from your SA302 or accountant-prepared accounts rather than estimates.

3

Review the usable income figure

The classifier calculates the income figure most lenders are likely to use in their affordability assessment, alongside your application profile signal. This figure takes into account how lenders typically average or select between years, and flags where your income pattern is likely to be assessed most and least favourably.

4

See the indicative borrowing range

Based on the usable income figure, the classifier shows three indicative borrowing amounts at conservative, standard, and flexible income multiples. These reflect the range of approaches lenders take and give a realistic envelope for what may be available – subject to equity, LTV, credit history, and existing commitments.

Use your most recent SA302 or accountant-prepared accounts for the most accurate result. Estimated or projected figures will produce an unreliable output – lenders will work from the documented figures, not projections.

How lenders assess income by trading structure

The income figure lenders use depends on how you trade. Understanding the assessment method for your structure helps you anticipate the usable income figure before running the classifier – and explains why the figure may differ from what you actually earn or draw from the business.

Sole trader

Lenders use net profit after allowable business expenses, taken from your SA302 tax return. This is not your turnover and not your take-home drawings – it is the profit figure after legitimate business costs are deducted. If your net profit varies significantly between years, most lenders will use the lower of the two most recent years or an average. A consistent or growing profit pattern produces the strongest application profile.

Limited company director

Most lenders use salary plus dividends drawn. Some lenders also consider a share of the company’s net profit – retained profit that has not been drawn as dividends – which can significantly increase the usable income figure for directors who reinvest in the business rather than drawing heavily. The classifier shows both approaches side by side, which helps identify whether it is worth specifically targeting lenders who accept the net profit inclusion. Our guide to secured loans for self-employed borrowers covers this in more detail.

Partnership

Lenders assess your personal share of the partnership’s net profit, taken from the partnership accounts and your individual SA302. The same averaging and lower-of-two-years logic applies as for sole traders. Lenders will want to see that the partnership is stable and that your profit share is consistent – a declining partnership profit or a recent change in profit share may prompt additional questions.

CIS contractor / day rate

Lenders commonly annualise a day rate using a 46-week convention, which accounts for gaps, holidays, and non-billable time. A contractor on £350 per day working five days a week would produce an annualised figure of around £80,500 under this method. Some lenders alternatively use the SA302 net profit figure. The classifier models both so you can see which produces the higher usable income for your specific working pattern.

What usable income means – and how borrowing ranges are calculated

The usable income figure is the starting point for the borrowing range – it is not a ceiling in its own right. Lenders apply an income multiple to the usable income figure to arrive at a maximum loan based on income alone. The actual maximum borrowing is then further constrained by the property value, combined LTV, credit history, and existing commitments – whichever is the lower limit applies.

Conservative multiple (4x) – cautious lenders

Some lenders cap income-based borrowing at four times the usable income figure. This is more common for borrowers with adverse credit, high existing commitments, or at higher LTV levels where the lender is already taking on more property risk.

Standard multiple (5x) – most lenders

The majority of mainstream secured lenders work to around five times usable income for self-employed borrowers with a clean credit profile and a reasonable debt-to-income ratio. This is the most commonly applicable multiple and the most useful benchmark for planning purposes.

Flexible multiple (5.5x) – higher income or lower LTV

Some specialist or more flexible lenders will stretch to 5.5 times income for borrowers with a strong income profile, a low combined LTV, and minimal existing commitments. This typically applies to higher earners or those with significant equity, and is less widely available than the standard multiple.

LTV is the other constraint

Even where income supports a higher borrowing amount, the combined LTV cap limits what is actually available. If your property equity supports only £100,000 of additional secured borrowing at 85% LTV, a usable income figure that supports £150,000 at 5x makes no difference – you are LTV-limited, not income-limited. Use the LTV and equity calculator alongside this tool to see which constraint applies to your situation.

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Frequently asked questions

How do lenders verify self-employed income?

The standard evidence for self-employed income is SA302 tax calculation documents and the corresponding Tax Year Overview, both downloadable from your HMRC online account. For limited company directors, lenders also require company accounts – either the full statutory accounts or abbreviated accounts prepared by an accountant. Payslips confirming the salary element are often requested for directors alongside the accounts. Some lenders additionally ask for bank statements covering three to six months to cross-reference declared income against actual receipts.

The key point is that income evidence must be documentable through official sources. Projected income, estimated earnings, or verbal descriptions of contracts are not acceptable as the basis for a secured loan application. If your most recent SA302 is not yet available because it covers a tax year that has not been filed, most lenders will accept the previous year’s figure while you wait, though some may request an accountant’s certificate covering the most recent year.

What if my income has varied significantly between years?

Variable income is common for self-employed borrowers and lenders account for it in their assessment, but the method they use determines the usable income figure. Most lenders take the lower of the two most recent years or an average. A year with unusually high income followed by a weaker year will pull the usable figure down even if your current trajectory is upward. A consistent or growing pattern of income is the most favourable profile.

If your income has genuinely improved and the improvement is sustainable, an accountant’s letter confirming the trend and the reasons for it can sometimes support a case where the averaged figure does not reflect current earnings accurately. This is more likely to be accepted by specialist or flexible lenders than mainstream ones, and a broker experienced in self-employed cases will know which lenders are most likely to give weight to that kind of supporting evidence.

Does it matter if my most recent year is my best year?

Yes – in your favour, if the previous year is also reasonably strong. Where the most recent year is significantly higher than prior years, some lenders will use the most recent figure alone rather than averaging, on the basis that it is the most current indicator of sustainable income. Others will average regardless. The classifier signals your application profile based on the pattern of your figures and indicates which approach is most likely to apply.

Where the most recent year is dramatically higher than prior years – for example following a major contract win or a significant change in the business – lenders may treat the uplift with caution unless it can be demonstrated to be sustainable. An accountant’s commentary on the business trajectory can help in these cases.

What else affects how much I can borrow?

The borrowing ranges the classifier shows are based on income multiples alone. The actual maximum borrowing from any specific lender also depends on your property value and combined LTV, your credit history, your existing monthly debt commitments, and the loan purpose. Any one of these can be the binding constraint even where income supports a higher amount. Use the LTV and equity calculator to check how much your equity position supports, and the eligibility checker to assess how your full profile is likely to be assessed together.

Do I need an accountant to apply for a secured loan if I am self-employed?

You do not strictly need an accountant – HMRC-generated SA302 documents and Tax Year Overviews are accepted by most lenders without the involvement of an accountant. However, lender-submitted accounts prepared by a qualified accountant are typically accepted more readily than self-submitted figures, and for limited company directors, having professionally prepared company accounts reduces the risk of lenders querying the figures during underwriting.

For borderline cases – where income is variable, the trading history is short, or the business structure is complex – an accountant’s letter confirming income and business stability can make a meaningful difference to how lenders view the application. A broker experienced in self-employed cases will advise on whether additional accountant evidence is likely to help in your specific situation.

Squaring Up

Self-employed income is more complex to assess than employed income, but it is not a barrier to secured borrowing. Understanding how lenders calculate the usable income figure for your specific trading structure is the most important preparation step – it tells you what to expect before you sit in front of a broker.

  • Usable income is not your earnings. Lenders use specific figures from your accounts – net profit for sole traders, salary plus dividends for directors, profit share for partners. What lands in your personal account is not what most lenders will assess.
  • Trading structure determines the calculation method. The same underlying earnings produce different usable income figures depending on whether you trade as a sole trader, director, partner, or contractor.
  • Two years of accounts is the practical minimum. Most lenders require at least two SA302s. One year of accounts significantly narrows lender choice, though specialist lenders exist for shorter trading histories.
  • Income variation is assessed conservatively. Most lenders use the lower of two years or an average. A strong most recent year does not override a weaker prior year with most mainstream lenders.
  • Limited company directors have options. Salary plus dividends is the default, but some lenders include a share of net profit. If you retain profit in the company, it is worth specifically targeting lenders who accept this approach.
  • Income is only one constraint. LTV, credit history, and existing commitments all apply simultaneously. Use the LTV calculator and eligibility checker alongside this tool to see which factor is the binding constraint for your situation.

The next practical step after using this classifier is to check your equity position and eligibility profile, then speak to a broker who has specific experience placing self-employed applicants with secured lenders.

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All figures are illustrative only and do not constitute financial advice. Income multiples are a guide – actual borrowing limits for secured loans depend on property value, LTV, credit history, existing commitments, and individual lender criteria. The usable income figure is based on commonly published lender assessment methods and may not reflect the approach of any specific lender. Always speak to a broker who can assess your full circumstances and access the full market for self-employed applicants. Your home may be repossessed if you do not keep up repayments on a mortgage or other debt secured on it.


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