CIS deductions: what expenses can you claim?

There are many CIS deductions you can use to reduce your tax bill and increase your refund:

1. Motoring expenses (“mileage allowance”)

There are two ways to calculate these:

  • based on how often you use your car for business only. you use it for work 75% of the time, then you can claim 75% of fuel, car insurance, etc.
  • or use HMRC’s simplified expense rate: 45p a mile up to 10,000 miles and 25p a mile for anything beyond this.

2. Materials, tools, and equipment

  • if you provide your own tools, then you can claim them
  • if you provide your own materials (paint, etc.), those expenses are also claimable.

3. Clothing and safety equipment

You can also claim reflective vests, gloves, etc., as well as their cleaning and repair.

They must be yours: if your contractor provides you with safety gear, you can’t claim it as an expense.

4. Accommodation, travel, and meals

If you ever work temporarily on a project in a different city, etc., then you can also claim:

  • hotel/motel
  • lunches
  • public transport fares.

5. Home office

You can claim a portion of your home as office space through HMRC’s simplified expenses rate.

For example, if you use your spare room as a home office for 25% of the time, then you can deduct 25% of your rent and bills (but not mortgage!).

6. Utilities, consumables, and advertising

You can also claim things paper, notebooks, and mobile phone - for example, if you use your phone 50% of the time for work and the rest for personal use, you can claim 50% of the phone bill

If you advertise your services through a website, you can also deduct these costs.

7. Professional fees


  • business insurance
  • public indemnity insurance
  • accountancy fees (including our fee at TaxScouts).

Need help with your tax return?

Get your self assessment prepared for you online by certified accountants for £99

Online self assessment preparation assisted by professional accountants

How TaxScouts works

Simple online tax assessment

1. Simple online tax assessment

Our online tax-bot will go over your tax situation and will make sure you won’t overpay your taxes.

Chat to human advisors

2. Chat to human advisors

You can talk to one of our tax assistants at any time during the process when you have any questions.

We’ll sort your documents online

3. We’ll sort your documents online

We’ll tell you exactly what documents you need and sort them for you online. You just upload them or snap a picture with your phone.

Everything gets prepared for you

4. Everything gets prepared for you

Your certified accountant will go over your details & prepare your tax return for you to review. It will be filed on your behalf once you approve it.

"Absolutely amazing service"
I've been worrying about my tax return for weeks and I'm so pleased I contacted TaxScouts. Outstanding service and problem solved.
Sandra S
I will happily recommend them and frankly don't care if Marcus is real or a room full of whirring AI - TaxScouts is brilliant.
Andy B
"Very fast"
Very fast and gave good advice I will be using every year
Wayne L
Read all the reviews from our dear customers on TrustPilot

Who our service is for

First time tax filers

We have a simple online service that guides you through the entire process. Regardless of your reasons for doing your tax return we'll help you get it done right.

Construction workers

We'll prepare your self assessment and help to maximise your CIS tax refund. We have the lowest fees in the industry and you don't have to pay up front if you're eligible for a refund.

People living overseas

Our service allows people living abroad to prepare their income tax return online. We are able to process all returns regardless of your current country of residence.

Company directors

UK company directors are required to file their self assessment annually. TaxScouts handles this through a simple online process.


Long Lets, Airbnb, Capital Gains. TaxScouts will sort out your self assessment and take away the worry of tracking all the recent tax changes.


TaxScouts ensures the self employed don't overpay on their taxes. We'll help you benefit from all the tax breaks and deductions that can be applied to your return.

And for everyone else who needs to do their self assessment

At TaxScouts we appreciate that tax returns are highly individual. Before you get assigned an accountant we make sure to understand your circumstances and help you build your optimal tax profile.

Let's start by creating your account

What happens next

  • We'll ask you a couple of short questions
  • Then we'll tell you what documents we need
  • Finally one of our qualified accountants will file your tax return
You are using an outdated web browser – TaxScouts works best with modern browsers. Please upgrade here.