CIS contractor mortgage

Your Gross Earnings Not Your net CIS deductions

CIS contractors are among the most underserved groups in the UK mortgage market. The Construction Industry Scheme deducts 20–30% at source, so your net pay understates your real income — and lenders who don’t understand CIS will mortgage you on that lower figure. We specialise in CIS contractor mortgages, working exclusively with lenders who gross up your net pay to its true pre-deduction value. So a contractor netting £3,200/month is assessed on £4,000 gross — a mortgage that reflects your actual earning capacity.

How CIS Income Assessment Works

CIS income is often misunderstood by mainstream lenders. We work with lenders who assess your earnings correctly, helping you maximise your borrowing potential.

Gross Income Assessment

We help ensure your CIS income is assessed before deductions, giving lenders a clearer picture of your true earning capacity.

Specialist CIS Lenders

We match your application with lenders who understand CIS payment structures and contractor income.

Accurate Income Presentation

Your CIS payment history is presented using the documentation and assessment method lenders expect.

Improved Borrowing Potential

Using the right lender and income assessment can significantly improve the mortgage available to you.

CIS Registration Unregistered versus registered subcontractors

Registered CIS subcontractors have a 20% deduction applied. Unregistered subcontractors face a 30% deduction. For mortgage purposes, both are grossed up by the corresponding lender to the pre-deduction gross. The difference in net income between a 20% and 30% deduction rate does not reflect a difference in gross earning capacity — it reflects a difference in registration status.

If you are currently unregistered and therefore subject to 30% deduction, registering with HMRC as a CIS subcontractor reduces the deduction rate to 20%, which improves your net income and makes your gross-up calculation more straightforward. We advise on the benefits of registration as part of our initial assessment.

What documents CIS lenders need

Having the right documents ready helps make the application process smoother and allows lenders to assess your income accurately.

Minimum CIS history How long do you need?

Most CIS-friendly lenders require twelve months of CIS deduction statements to demonstrate consistent income. Some will consider nine months of history for applicants with a strong financial profile. Unlike some other contractor income types, the two-year SA302 requirement does not apply where the lender is using CIS gross-up assessment rather than self-assessment income.

For CIS contractors who have been in the scheme for less than twelve months, the options are more limited but not non-existent. We identify the lenders most flexible about CIS history length and advise on whether waiting to accumulate a full twelve months of statements produces materially better mortgage options.

New builds and CIS mortgage applications

CIS contractors who buy new-build properties,  whether as a primary residence or as a BTL investment, follow the same application process as any other CIS mortgage. The extended offer validity that new build lenders provide is particularly useful for CIS applicants who may be planning their purchase several months in advance.

We advise on new build purchases for CIS contractors using the same lender selection approach as for existing property purchases.

FAQs

Frequently Asked Questions

The most common reason is that the lender has assessed your income on the net CIS figure rather than grossing it up to the correct pre-deduction amount. This is a lender selection problem — not all lenders understand CIS gross-up. With the right lender, your mortgage offer will reflect your actual gross earnings.

No — VAT registration is not a requirement for CIS mortgage applications. The primary evidence lenders need is your CIS deduction statements showing gross and net income, not your VAT registration status.

Yes — if you have both CIS income and income from self-employed work outside the CIS scheme, both can be considered by some lenders. The treatment depends on the lender and how the income is documented. We assess the most beneficial approach for your specific income mix.
Variable CIS income is common and well-understood by CIS-specialist lenders. They typically average your CIS income over the twelve-month statement period rather than requiring consistent monthly figures. We identify the lenders whose averaging approach gives you the best assessed income.
Mortgage lenders require income to be evidenced through bank statements. Cash payments that do not appear in your bank account cannot be included in the affordability assessment. Lenders also have strong anti-money-laundering obligations and will scrutinise cash-heavy bank statements carefully. If a significant portion of your CIS income has been paid in cash, we advise on how to approach the application most carefully.