How to calculate work from home expenses

Did you know that if you work from home, you may be able to claim tax breaks on certain bills and expenses?

Working from home offers all sorts of benefits for employers and employees alike – employers get to cut overheads as staff aren’t onsite using the facilities and utilities, while employees get the flexibility of fitting work around other commitments, such as the school run.

Not to mention missing the rush hour commute.

And studies have found that working from home increases staff morale and productivity, another win for both employer and employee.

There could also be tax breaks in it too…

If you have to work from home

If you have to work from home on a regular basis, you may be able to get the tax back from some of your bills – but you can only claim for things to do with your work, such as business telephone calls or the extra cost of gas and electricity for your work area.

Unfortunately, you can’t claim for things that you use for both private and business use though, so getting tax relief on rent or broadband is out of the question..

And if you’re claims are no more than £4 per week (£18 per month) you don’t need to provide any records. If you’re claiming for more than £4 per week though, you’ll need to provide evidence of what you’ve spent.

If you offer to work at home

If you’ve offered to a work from  voluntarily and as part of a homeworking arrangement with your employer, they may still contribute towards your expenses but don’t have to.

If your employer contributes up to £4 per week (£18 per month) towards your expenses, you won’t need to provide receipts.

If your employer contributes more than £4 per week you will need to be able to show what you’ve spent to get tax relief.

And you won’t have to pay tax or National Insurance contributions on the amount you get from your employer.

If you work at home voluntarily and your employer doesn’t contribute to your expenses, you can’t claim tax relief for what you’ve spent.

Capital Gains Tax

It was brought to our attention in the comments section that there are certain tax implications when it comes to selling your house if you designate a room in your home purely as office space, with no personal uses – there’s more on that in this article from The Telegraph.

What costs can you deduct from your taxes when you have a home office?

When using a room at home as an office, HMRC allows you to deduct two types of costs from your taxes:

Fixed costs

  • Rent
  • The interest on your mortgage (you cannot, however, deduct part of the capital repayments)
  • Council Tax
  • Insurance (unless you have separate insurance for your business, in which case you can deduct the full cost)
  • Repairs and maintenance

Running costs

  • Heating, lighting and electricity
  • Water and sewerage
  • Phone and broadband
  • Cleaning

What counts as a ‘room’ you can use as a home office?

Although, HMRC is generally quite vague when it comes to defining exactly what a room is, describing it simply as a “normal living space”, the general consensus seems to be that kitchens, bathrooms and hallways don’t count as rooms. This will leave most with just the living room, the bedrooms and the room you use as an office count as rooms for tax purposes.

In theory, you can claim a deduction for two rooms, and may have to if you’re a photographer who needs a separate ‘dark room’ to develop photos. But unless this, or a similar reason, is the case, then you should only claim for one room. Don’t claim for two rooms if you just switch for a change of scenery now and then.

How to calculate work from home expenses

This handy infographic has a breakdown of exactly how you can work out those work from home expenses…


  1. Mike said:

    I am not an accountant but having been self-employed and working from home for many years, I have been given to understand that, if you claim tax allowances for working from home, there are capital gains tax implications when you come to sell your property and I have been given to understand that the tax man will take back a lot more than you can claim in expenses.

    It is worth checking with your accountant before you claim.

    February 1, 2017
  2. Does it count as working from home if you run a business from home but the actual work is done mainly outside of the home?

    February 6, 2017
    • Les Roberts said:

      Hi Simona,

      Thanks for getting in touch – HMRC is aware every sole trader who runs a business from home some or all of the time, will have a different set-up.

      So, when you work at home, you’re allowed to take a proportion of all your home running costs and put those into your expenses, so that they reduce your profit and you pay less tax. Obviously, none of your utility bills will be split for domestic and business usage, so you need to work out the proportion you use depending on how much of your home you use for business at all, and how much you’re using that part of your home for business use as opposed to private use.

      It’s worth taking a look at this simplified working from home expenses page on HMRC

      February 6, 2017
  3. Matt said:


    I work for a company as a remote worker so its not my own business, from what i have read as my home office is not soley for work it is just my designated area for work during office hours then the capital gains issue is not a problem, if i have understood it right?

    2nd, i am just looking to claim some money back for my heating and electricity but seem unsure if my company should do this or if i have to claim it back as answers seems a bit vague. any advice welcome.


    December 2, 2019
    • Les Roberts said:

      Hi Matt,

      Thanks for getting in touch.

      I think you’re right – as it’s not a space solely designated for work, then there should be no need to worry about Capital Gains Tax.

      As for the heating and electricity costs, I’d say to pick it up with your employer first as it could have tax implications for them, they should be able to advise you of the best way to go about it.

      December 2, 2019
    • Syl said:

      Hi Matt, I hope you will see this! Have you figured out how to organise your working from home expenses? I work solely from home as our local office shut down last year.
      My employer has not contributed anything towards bills and other associated costs.
      Have you applied the method from the infographics successfully? Is the employer contributing anything towards your bills/rent/etc?

      October 21, 2020

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