Simplified Expenses for Self-employed in the UK

Paola Faben Oliveira

If you’re a sole trader¹, or run certain business entity types, you may be able to deduct allowable expenses - essential costs involved in running your company - for tax purposes.

Depending on your situation, you may need to add up all allowable expenses one by one - or you may be able to turn to the HMRC simplified expense method.

⚠️ Simplified expenses aren't the right approach for everyone, and they're not an option for all companies.

This guide walks through how self-employed simplified expenses work, and what you can claim for things like vehicles, home office expenses or if you live at your business premises.

📝 Table of contents:

What are simplified expenses?

Under HMRC rules, you may be able to deduct certain allowable expenses from your revenue when you calculate your taxable profit.

Allowable expenses are basically the costs which arise from running your business, which may be one off payments, or regular costs. Some examples of allowable expenses include:

  • Costs of running an office or business premises - such as business rates, utilities, phone bills and stationery
  • Costs of paying suppliers, staff and subcontractors
  • Financial costs like insurance
  • Advertising and marketing costs
  • Staff training and uniform costs
  • Travel costs for business travel

To work out how much your business can claim in allowable expenses using normal accounting methods you may have to add up each expense one by one.

However, this may cause a huge amount of administration, depending on your business type. HMRC offers the simplified expenses method² as an alternative to help some self-employed people and small business owners to save time on their accounting process.

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How do simplified expenses work?

Simplified expenses means using flat rate expenses for your allowable expense claims, instead of needing to add up every business payment you’ve made over the year.

That can be far easier to manage from an admin point of view - although you’ll still need to keep accurate records and receipts in case you’re asked to provide evidence of payments.

We’ll look at a few examples in more detail in a moment - but one common use case is for people who work from home. Under normal allowable expense rules, you’d be entitled to claim a portion of the costs of your home office as an expense - but you’ll need to accurately split out and calculate what you’re paying for your office as opposed to the part of the house your family lives in.

Under the simplified expense method, if you have a home office, you can calculate how many hours per month you worked from home and then claim a flat rate of expenses based on government allowances. This saves time as you don’t have to come up with the exact cost of your household and utility bills that can be attributed to business expenses.

Using simplified expenses may save you and your business time and money - and HMRC offers a really handy calculator tool³ to help you decide if they’re the right approach for you, too.

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Who can use simplified expenses?

Simplified expenses can be used by:

  • sole traders
  • business partnerships that have no companies as partners

That means that HMRC simplified expenses are well worth looking at if you’re self employed - but if you run a limited company in the UK you won’t be able to consider this approach.

What can simplified expenses cover?

Even if you’re entitled under HMRC rules to use simplified expenses, you can’t use this approach to every single type of allowable expense. Simplified expenses are mainly used for:

  • Business vehicle costs, including mileage
  • Working from home
  • Living in your business premises

We’ll look at how each of these different expense types work under the simplified expenses method, next.

Simplified expenses working from home

simplified-expenses-uk

It can be challenging to calculate business expenses when working from home. Usually what you’d need to do is work out exactly what portion of things like your mortgage interest, utilities, internet or council tax, can be attributed to your business⁴.

For things like utilities this could be based on how much of the house you use for work purposes, but it can be tricker to calculate things like how much of your internet or phone bill relates to running your company.

The simplified method helps self-employed people to calculate and divide the expenses between home and work affairs⁵. If you work from home 25 hours a month or more you can use this approach.

How to calculate working from home expenses

Here are the HMRC simplified expenses working from home flat rates:

Hours of business use per monthFlat rate per month
25 - 5010 GBP
51 - 10018 GBP
101+26 GBP

So if you work from home for 30 hours one month, and then 60 hours the next, you’d add up:

💰 10 GBP + 18 GBP = 28 GBP in home office allowable expenses over that time.

Simplified expenses mileage

Under normal accounting rules you may be able to claim allowable expenses for some travel, mileage and vehicle costs⁶. However, this becomes trickier if you use the same vehicle for both work and private travel. In this case the simplified expenses mileage method⁷ may help.

Under the mileage flat rate expense approach you’ll claim a fixed rate per mile, which is intended to represent the average cost of both the fuel and the costs of running your vehicle. Eligible vehicles include:

  • Cars (vehicles designed for commercial use, like black cabs or dual control driving instructors’ cars are not eligible)
  • Goods vehicles (for example, vans)
  • Motorcycles
⚠️ Once you start using the simplified expense method for a given vehicle you must stick with this accounting approach until you stop using that vehicle for work.

How to calculate mileage expenses

Here are the HMRC simplified expenses mileage rates:

Vehicle typeFlat rate per mile
Cars and goods vehicles - up to 10,000 miles0.45 GBP
Cars and goods vehicles - over 10,000 miles0.25 GBP
Motorcycles0.24 GBP

So if you’ve done 10,000 miles over the year the calculation would be:

💰 10,000 x 0.45 GBP = 4,500 GBP simplified mileage allowable expense

Living at your business premises

If you live at your business premises - for example by living in and running a bed and breakfast or guest house - you may also use the simplified expense method to calculate allowable expenses for this⁸.

This is distinct from having an office in your family home in that the property itself is the core of the business, rather than being a home first with an office as a small portion of it.

When you live in your business premises, you’ll need to calculate the full cost of running the premises, and then deduct a flat rate to account for the portion of the property you use for personal use - the opposite calculation to that used for working from home.

Calculate the flat rate deduction based on the number of people living in the property, and then deduct this from the full cost of running the premises when you calculate your taxable profit.

How to calculate living at your business premises expenses

Here’s the simplified expenses - living at your business premises flat rates:

Number of people living in the premisesMonthly flat rate
1350 GBP
2500 GBP
3650 GBP

If you’re living alone as a live-in manager of a guesthouse, for example, over the course of a tax year you’d be able to claim:

💰 12 months x 350 GBP = 4,200 GB

Calculate the full cost of running the guest house for the year, and deduct 4,200 GBP to reflect the cost of the property used for personal use.


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If you’re self-employed or a small business owner in the UK, a Wise Business account can make it easier to run your company and manage your expenses.

Open your account for a one time low fee, to hold and exchange multiple currencies, and apply for expense cards for you and your team.

Exchange currencies within the account, spend on your cards, or send payments to international suppliers, contractors and staff, with the mid-market exchange rate and low, transparent fees.

That cuts your costs - and with business friendly perks like batch payments, cloud accounting integrations and instant uploads for expense receipts, you can cut your admin time too.

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Simplified expenses aren’t the right approach for everyone. But if you’re a sole proprietor or run an eligible business entity type, they’re worth looking at as a way of cutting down admin time, and possibly saving money too.


Sources used for this article:

  1. Gov.uk - expenses if you’re self employed
  2. Gov.uk - simplified expenses
  3. Gov.uk - simplified expense checker
  4. Gov.uk - self employed expenses: office
  5. Gov.uk - simplified expenses: working from home
  6. Gov.uk - self employed expenses: vehicles
  7. Gov.uk - simplified expenses mileage
  8. Gov.uk - simplified expenses living at your business premises

Sources checked on 19-09-2022


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