For damp proofing & insulation

MTD for Income Tax for damp proofing & insulation.

Scheme-funded measures, guarantee commitments, materials and a split between paid surveys and installs. Here's how Making Tax Digital for Income Tax applies to damp proofing and insulation specialists, and when it starts.

When does it start for me?

In scope now over £50k, from April 2027 over £30k.

MTD for Income Tax phases in by gross income before expenses. Scheme-funded work and materials passing through your accounts can lift your gross turnover.

Live now
£50,000
In scope from April 2026
Your likely date
£30,000
In scope from April 2027
£20,000
In scope from April 2028
Scheme income counts

Funded work is income like any other.

Whether a job is paid by a customer, a lead installer or a funding scheme, the payment is gross income for the threshold. Recording the materials against the job keeps your tax based on the real margin.

What records you need →
What's changing

Digital records, four quarterly updates, one final declaration.

When you're in scope, your annual Self Assessment return is replaced by four short quarterly updates and a year-end final declaration, all through recognised software.

Expenses to keep digital

  • Damp-proofing and insulation materials
  • Injection and application equipment
  • PPE and protective kit
  • Van, fuel and running costs
  • Scheme registration or accreditation
  • Public liability insurance

Keep survey and install income separate in your records so each quarter is clear and accurate.

  • Scheme-funded Income when invoiced or paid
  • Survey vs install Both income, recorded separately
  • Guarantees Recorded only when you spend
The installer detail

The bits specific to your work.

Scheme-funded work

ECO and similar measures are income however they're funded. Record the payment and the materials against the job.

Survey and install

A paid survey and the install that follows are both income. Keep them separate so your quarters are clear.

Guarantees

A guarantee is a future commitment. There's nothing to record until you spend money honouring it, then it's an expense.

Materials

Damp-proofing and insulation materials are deductible. Snap the receipts so your expense total stays complete.

Why Clear Books

Funded work and installs, kept straight.

Different payers and a survey-to-install pipeline mean records that need to stay clear. Clear Books keeps it organised and gives HMRC exactly what MTD needs.

  • Record scheme, installer and customer income
  • Keep survey and install income separate
  • Log materials and scheme costs as expenses
  • See your gross income against the thresholds
  • Send HMRC-compliant quarterly updates in minutes
  • Free plan available, no timer
The Clear Books MTD for Income Tax submissions screen showing four quarterly updates submitted to HMRC
Q1 update submitted
HMRC recognised
Common questions

Damp proofing & insulation MTD FAQ.

When does MTD for Income Tax start for damp proofing and insulation installers?
If your gross income is over £50,000 it applies now, from 6 April 2026. Between £30,000 and £50,000, your start date is April 2027, and from April 2028 the threshold drops to £20,000.
How do I record grant or scheme-funded work?
Payments for scheme-funded work such as ECO measures are income you record when you invoice or are paid, whoever pays. The materials go against the same job as an expense.
How is a survey and install split treated?
A paid survey and the install that may follow are both income, recorded in the quarter each happens. Keeping them separate makes your figures clear.
What about guarantees I give on my work?
A guarantee is a future commitment, so there's nothing to record until you spend money honouring it. When you do, that repair cost is a business expense.
What can I claim?
Typical costs include damp-proofing and insulation materials, injection and application equipment, PPE, your van and fuel, insurance and any scheme registration or accreditation.
Free for sole trader installers

Know where you stand before the deadline.

Record funded work, surveys and installs as you go, watch your gross against the thresholds, and be ready to submit when your wave lands.