Smart Tax Savings for Your Home Office: A UK Guide

Plenty of people work from home without realising they could be saving money. If you’re covering household costs while running your business, it’s worth looking into what you can claim, especially when it comes to working from home tax relief.

Author Image
Published May 1, 2025
Reading time: 6 minutes

We take a look at what tax relief options are available to the home worker, and how to process that claim from HMRC when working from home. Your home office opens doors to a number of options in respect of offsetting your home working expenses – from occasional home workers to full-time remote professionals. 

You’ll find two main options: a simple flat-rate scheme or calculating actual costs directly related to your homeworking such as utilities and insurance. Many home business owners miss claiming their full tax relief entitlements. The rules differ between sole traders and limited companies, but the potential savings can be significant for both. Money saved through proper tax claims stays in your pocket. 

Home Office Tax Benefits: Your Essential Guide

The magic of running a business from home? Well, sometimes it’s the tax benefits. Let’s break down what HMRC considers valid business use of your home space.

What Counts as Business Use?

HMRC’s golden rule is for defining what counts as business use is “wholly and exclusively” for business. Don’t let this worry you though, as this doesn’t mean you need a separate room just for work. In fact if you did that, your private residence capital gains tax position could be hurt if you sell your home. A dedicated corner or space works perfectly fine. 

‘Business use’ starts by looking at::

  • How much of your home serves as your office
  • Your weekly working hours at home
  • Power and equipment use
  • Whether the space doubles for personal activities

Expenses You Can Claim

Your home office opens up several tax-deductible costs:

  • Utilities: Your share of heating, power and water
  • Property Costs: Parts of mortgage interest, rent or council tax
  • Communications: Work calls and internet
  • Insurance: Portions of home and contents cover
  • Repairs: Workspace maintenance
  • Equipment: Office furniture and tech

Remember: Keep proper records showing how you split personal and business use.

Rules for Different Business Types

The rules change based on how you’ve set up your business:

The self employed, sole traders have the most options on how to approach it. It offers a choice between simple flat rates, or actual cost calculations.

Limited Company Directors work under tighter rules. Three options exist:

  • HMRC’s weekly flat rate
  • Create a rental agreement with your company
  • Claim extra costs from business use only

You may be interested to know that employees need to understand their employer’s requirements before a claim, as the validity of claiming will focus on if homeworking is a choice or necessary.  However this guide looks at those running their own business, so lets turn our heads back to that.

Remember HMRC’s core principle: every expense must serve your business “wholly, necessarily and exclusively”.

Home Office Expenses: Your Numbers Made Simple

Calculating your home office expenses offers two main approaches: a straightforward, fixed option (flat rate) or a more customised calculation based on actual costs.

The Simple Flat Rate Method

HMRC’s flat rate system works like a ready-made solution. This system defines your monthly claim depending on your working hours and to be able to use this method you will need to be working at least 25 hours a month from home. At the time of publication it looked like this:

  • £10 for 25-50 hours
  • £18 for 51-100 hours
  • £26 for 101+ hours 

This is the simple approach and covers basic costs like utilities and household items. However for costs such as internet and phone, will need separate claims.

The Actual Costs Method

If you think your costs equate to more than the flat rate offers,  you may want to explore if you can make bigger tax savings. The actual cost method is available and while it needs more number-crunching, it can mean more savings for you but it’s important that you understand the basis of calculating actual costs of working from home. It requires you to calculate based on the rooms in your home, the percentage used for working (time and cost), and applying that formula to bills. This sounds complicated but there are many guides available to take you through step by step. 

Not sure which approach to take?

HMRC offers a calculator to work out if the flat rate or actual cost method is going to work out better for you, so it’s definitely worth going through this first before deciding, click here to use.

Tax Returns: Getting Your Claims Right

Your home office calculations are ready – brilliant! Now let’s make sure your submission to HMRC gives you your maximum entitlement.. The paperwork might look daunting, but broken down it becomes easier. Like with all things, once you have completed for the first time, you’ll be much better equipped to approach them each year. 

Sole Traders: Your Self-Assessment Steps

The “Business Costs” section of your Self-Assessment return is where the magic happens. New to Self-Assessment? Pop your registration in by 5 October after your first tax year. Mark these deadlines in your diary:

  • 31 October for paper returns
  • 31 January for online submissions

Your home office claim needs either:

  • Your monthly flat rate
  • Your calculated actual expenses

Limited Companies: Corporation Tax Rules

Running a limited company? Your return needs filing within 12 months after your accounting year ends. The company, not you personally, claims these expenses.

Directors, you’ve got three choices:

  • Take the flat rate allowance as company expenses
  • Set up a rental agreement with your company
  • Arrange the company to pay your home business costs directly.

Remember!  Your Corporation Tax Payment – due nine months and one day after your accounting year ends.

Your Record-Keeping Checklist

HMRC may need evidence. These are some of the records you should keep safe and ready:

  • Proof that home working isn’t just a preference
  • Every receipt and bill for actual cost claims
  • Your business proportion calculations
  • Time records for flat rate claims

File everything away for five years. HMRC might never ask, but if they do, you’ll be ready. Good record-keeping is like insurance – it protects you when you need it most. Record keeping is key to tax returns, so ensure you have a system that works for you set up from day one. 

Smart Home Office Setup: Maximise Tax Benefits, Minimise Risks

The right setup for your business record keeping not only helps you maximise your tax savings but also protects your future position if you need to provide evidence to HMRC .

Clever Workspaces

Your homeworking can shape both today’s tax claims and tomorrow’s tax bills. Here are some ideas to help you think about how to approach yours: 

  • Can you split your utilities? – Explore your options to obtain business and personal suppliers into your home to help define costs. 
  • Make your workspace flexible – think business by day, family room by night
  • Track every business purchase – from office equipment to lighting. It can all count.

The Personal Touch Matters

Here’s a fact: HMRC treats “exclusive” business spaces differently from mixed-use areas. Pure business use might boost your immediate tax relief, but this approach can have a negative on private residence Capital Gains Tax. It’s very important that you understand this as a home worker, in the event that you decide to move and sell your home

To avoid this, you should consider giving your office a second life. Perhaps it’s your reading nook in the evening or weekend yoga space.  Even occasional personal use can keep your tax benefits. Plus, you’ll protect your valuable Principal Private Residence Relief.

Exclusive business areas in your home will trigger tax implications and costs of your profit if you sell your home as your private residence relief will be affected. Those personal touches we talked about earlier keep your full tax relief intact while letting you claim your fair share of expenses.

More home workers means more HMRC attention to property sales. Stay one step ahead – keep your space flexible, your records clear, and your tax position protected.

Your Home Working Tax Success Story

Smart home working  tax planning can put money back in your pocket. Whether you fancy the simple flat rate or dive into the more detailed calculations, every proper claim strengthens your business finances.

What’s the secret to long-term tax success? Your record keeping tells the story. Proper records protect your immediate tax relief while smart space planning safeguards your Capital Gains position. 

Remember your business structure shapes your claims. Sole traders, you’ve got room to manoeuvre. Limited company directors, you’ll need to mind those stricter rules. But here’s the golden rule for everyone – keep those records spotless and know HMRC’s requirements inside out. Your home working setup is like a savings account – the effort you put in today to understand how it works from a tax perspective, grows into tomorrow’s rewards. Your careful planning now means smoother tax returns and better savings in future returns.

Our articles, guides & reviews are provided as general information only. Any expressed view, product or service mentioned within these does not constitute as financial advice or recommendation by us.

Be mindful that information may have changed since publication
Author Image
About the author
Deb Cissell
Deb is an experienced compliance and operations specialist with over 20 years in financial services. She has helped financial organisations navigate regulatory requirements, lead innovative projects, and shape customer-focused communication strategies. At Know Your Business, Deb ensures complex financial information is presented clearly, accurately, and accessibly for business owners, and brings her broad knowledge and experience of business and personal finance to her writing.