What Are Simplified Expenses?

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    Written by:

    Steven Hillman FCA

    Chartered Accountant

    Updated on:

    23 July 2025

    What Are Simplified Expenses?


    If you’re self-employed, working out your expenses can take time.


    You end up keeping receipts, adding everything up, and trying to work out what you can and cannot claim.


    Simplified expenses are HMRC’s way of making this easier.


    Instead of tracking actual costs for certain expenses, you use flat rates set by HMRC. This reduces admin and can make your tax return much quicker to prepare.


    How Simplified Expenses Work


    Normally, you would calculate your business expenses based on actual costs.


    With simplified expenses, you use fixed rates for certain categories instead.


    These include:


    • working from home
    • using your vehicle
    • living in your business premises


    You don’t have to use simplified expenses. You can choose the method that works best for you.


    However, you cannot mix methods for the same type of expense. For example, if you use the mileage method for a vehicle, you cannot also claim actual running costs for that same vehicle. You can still use different methods for different types of expenses.


    Working From Home


    If you work from home, you can use HMRC’s flat rates instead of working out a proportion of your household bills.


    The amount you can claim depends on how many hours you work from home each month:


    • 25 to 50 hours: £10 per month
    • 51 to 100 hours: £18 per month
    • 101 hours or more: £26 per month


    These rates cover general household running costs such as:


    • electricity
    • heating


    Broadband and other specific costs may need to be considered separately depending on your usage.


    This approach is simple, but in some cases, claiming actual costs may give a higher deduction.


    Vehicle Costs


    If you use a vehicle for business, you can use simplified mileage rates instead of tracking fuel, repairs and running costs.


    The current HMRC rates are:


    Cars and vans:


    • 45p per mile (first 10,000 miles)
    • 25p per mile thereafter


    Motorcycles:


    • 24p per mile


    These rates cover:


    • fuel
    • maintenance
    • insurance
    • general running costs


    You cannot claim these costs separately if you use the mileage method.


    If you choose the mileage method for a vehicle, you must continue using it for that vehicle. You also cannot claim capital allowances for that vehicle.


    Living in Your Business Premises


    If you live in your business premises, for example above a shop or in a pub you run, you can use simplified expenses to split personal and business costs.


    Instead of working everything out in detail, HMRC provides fixed amounts to deduct for private use:


    • 1 person: £350 per month
    • 2 people: £500 per month
    • 3 or more people: £650 per month


    You deduct this from your total property costs to arrive at the business element.


    This is often much simpler than trying to split every bill manually.


    Should You Use Simplified Expenses?


    Simplified expenses are designed to save time.


    They are useful if:


    • your costs are relatively low
    • you want to keep things simple
    • you do not want to track detailed records


    However, they are not always the most tax-efficient option.


    If your actual costs are high, using the real figures may result in a larger deduction and a lower tax bill.


    Key Things to Watch


    A few points to keep in mind:


    • You cannot mix methods for the same expense type
    • Simplified expenses are only available to sole traders and partnerships, not limited companies
    • You still need to keep basic records to support your claim


    Choosing the right method is about balancing simplicity and tax efficiency.


    Final Thoughts


    Simplified expenses can take a lot of the stress out of preparing your tax return.


    For many small businesses, they offer a straightforward way to claim common costs without getting bogged down in detail.


    That said, they are not always the best option financially.


    It’s worth reviewing both methods to make sure you are not missing out on additional relief.

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