Choosing between working as a sole trader and setting up a limited company affects how you pay tax, take money from the business, claim CIS deductions and manage your accounts.
There is no single structure that suits every builder, contractor or construction business. The right choice depends on your profit, personal income, growth plans, commercial risks and how much money you need to withdraw.
The Main Difference
As a sole trader, you and the business are legally treated as one. You keep the profits after paying Income Tax and National Insurance.
A limited company is a separate legal entity. It pays Corporation Tax on its profits, while you may pay personal tax when taking money as salary or dividends.
Sole Trader Tax in 2026
Sole traders pay Income Tax on their taxable business profits, not their total sales.
For the 2026/27 tax year, the standard Personal Allowance is £12,570. In England, Wales and Northern Ireland, taxable income is generally charged at 20% within the basic rate band, 40% within the higher rate band and 45% at the additional rate.astrill+1
Self employed people also normally pay Class 4 National Insurance. The main rate is 6% on profits between £12,570 and £50,270, with a 2% rate applying above that level.
A key point is that sole traders are taxed on their business profit even if they leave some of the cash in the business. Simply keeping money in the business bank account does not delay the personal tax charge.
Limited Company Tax in 2026
A limited company pays Corporation Tax on its taxable profits. The main Corporation Tax rate is 25%, while companies with profits of £50,000 or less may qualify for the 19% small profits rate. Marginal relief may apply between £50,000 and £250,000. These limits can be reduced where the owner controls associated companies.
Directors usually take money through a combination of salary, dividends, pension contributions and repayment of money previously introduced into the company.
Dividends can only be paid from available company profits after Corporation Tax. For 2026/27, the Dividend Allowance is £500. Dividend tax rates are 10.75% for basic rate taxpayers, 35.75% for higher rate taxpayers and 39.35% for additional rate taxpayers.image.jpg+2
Companies must also consider employer National Insurance. For 2026/27, the standard employer rate is 15% above the relevant secondary threshold, which is £5,000 a year for most employees.
This means a limited company is not automatically the lowest tax option. Corporation Tax, dividend tax, salary tax, National Insurance and administration costs must be considered together.
Tax Comparison at a Glance
Sole Trader
Main advantages
- Simple to establish and operate
- Fewer statutory filing duties
- Lower accounting costs in many cases
- Business losses may offer useful relief, depending on the circumstances
- Money can be withdrawn without processing salary or dividends
Main disadvantages
- Income Tax and Class 4 National Insurance apply to taxable profits
- Higher profits can quickly enter higher Income Tax bands
- Tax applies even when profit is retained for future tools, vehicles or materials
- The owner is personally responsible for business debts
- Some large contractors may prefer dealing with incorporated suppliers
Limited Company
Main advantages
- The company is legally separate from its owners
- More flexibility over salary, dividends and pension contributions
- Profits can remain in the company for future investment after Corporation Tax
- The structure may suit construction businesses planning to employ staff or secure larger contracts
- Ownership can be shared through company shares
Main disadvantages
- More accounting and Companies House responsibilities
- Corporation Tax and personal extraction tax may both apply
- Dividends require sufficient distributable profits and proper records
- Employer National Insurance can increase the cost of taking a salary
- Business money cannot be withdrawn freely without considering the correct tax treatment
How CIS Affects the Choice
The Construction Industry Scheme can apply whether you trade as a sole trader or through a limited company.
Registered subcontractors are normally subject to deductions at 20%. The rate can be 30% where HMRC cannot verify the subcontractor, while businesses approved for gross payment status can receive payments without deductions.
For a sole trader, CIS deductions are normally claimed through the Self Assessment return as tax already paid.
For a limited company, CIS deductions suffered are usually managed through the company payroll process. Poor CIS records can cause delayed repayments, cash flow pressure and differences between contractor statements and the company accounts.
CIS deductions are payments towards tax. They should not automatically be treated as a business expense.
Expenses and Record Keeping
Both structures can normally claim costs incurred wholly and exclusively for the business, subject to the relevant tax rules. Common construction expenses may include tools, materials, protective clothing, insurance, accountancy fees, training, site travel and vehicle costs.
The treatment depends on what was purchased and how it is used. A van, car, major item of equipment or mixed personal expense may require a different calculation from an everyday site cost.
Limited companies must keep company and personal spending separate. Directors who use company funds personally may create a director loan account or additional tax charge if the payment is not recorded correctly.
VAT and Construction Work
Changing from a sole trader to a limited company does not remove VAT responsibilities. Registration should be reviewed by looking at taxable turnover, the type of work performed and the customers being invoiced.
Construction businesses must also consider the domestic VAT reverse charge when supplying qualifying construction services to another VAT registered business. Incorrect invoices can lead to underpaid VAT, rejected payments and difficult corrections later.
Which Structure Is Better?
A sole trader structure may suit someone who is starting alone, has moderate profits and wants straightforward administration.
A limited company may be more suitable where profits are growing, money can remain in the business, commercial risk is increasing or the owner wants more control over how income is extracted.
The decision should not be based on turnover alone. Two construction businesses with the same sales can have very different profits, CIS deductions, equipment costs and personal income requirements.
When Should You Consider Changing?
It may be time to review your structure when:
- Profits are consistently increasing
- You are moving into the higher Income Tax band
- You do not need to withdraw all business profits personally
- You are employing workers or using more subcontractors
- You are bidding for larger commercial contracts
- You want to bring another owner into the business
- Personal and business risks are becoming harder to separate
Before incorporating, review outstanding CIS deductions, VAT registration, contracts, equipment, vehicles, debtors and existing business liabilities. Moving the trade without planning can create avoidable tax and accounting problems.
How Construction Tax Accountants Can Help
Choosing a structure should involve more than comparing headline tax rates. Construction Tax Accountants reviews the complete position, including profit, CIS, VAT, personal income and future plans.
- Compare the estimated tax cost of sole trader and limited company structures
- Review salary, dividends and pension options for company directors
- Register and manage CIS for contractors and subcontractors
- Reconcile CIS deductions and identify missing contractor statements
- Review VAT registration and domestic reverse charge responsibilities
- Record tools, vehicles, equipment and allowable construction expenses correctly
- Prepare bookkeeping, payroll, year-end accounts and tax returns
- Provide tax forecasts so money can be set aside before payment deadlines
- Support incorporation and the transfer of an existing construction trade
- Provide ongoing advice as the business grows
FAQs
Is a limited company more tax-efficient than being a sole trader?
Not always. The result depends on profit, salary, dividends, other income and how much money is withdrawn.
Can a sole trader register for CIS?
Yes. A sole trader can register as a CIS subcontractor, contractor or both where the relevant conditions apply.
How are CIS deductions claimed by a limited company?
A company normally reports and claims CIS deductions suffered through its payroll records rather than deducting them directly from Corporation Tax.
Can I change from a sole trader to a limited company?
Yes, but contracts, assets, VAT, CIS, vehicles and existing liabilities should be reviewed before the trade is transferred.
Do construction companies have to register for VAT?
VAT registration depends on taxable turnover and other circumstances. Construction businesses must also check whether the domestic reverse charge applies.
Can a limited company claim tools and vehicle costs?
It may claim qualifying business costs, but the treatment depends on ownership, business use and whether the item is a car, van or capital asset.
Does incorporation protect me from every business debt?
No. Limited liability can provide protection, but personal guarantees, wrongful conduct and certain legal obligations can still create personal exposure.
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- Compare sole trader and limited company tax for UK construction businesses in 2026, including Income Tax, Corporation Tax, dividends, VAT and CIS.
