If you’re using your car for work, knowing how to track mileage in the UK is one of the simplest ways to reduce your tax bill. It sounds like admin, but once you’ve got a system in place, it becomes quick, easy, and well worth it.
Let’s go through how it works and how to make it effortless.
How HMRC mileage actually works
Before you start tracking, it’s worth understanding what you’re claiming.
Most business owners use HMRC’s mileage rates instead of tracking actual car costs. It keeps things simple and avoids dealing with fuel receipts and repair bills.
Right now, the rates are:
- 45p per mile for the first 10,000 miles
- 25p per mile after that
That rate already includes fuel, servicing, insurance, and general wear and tear. So once you choose this method, you stick with it for that vehicle.
In simple terms, every mile you track properly turns into tax relief. If you miss miles, you miss money.
What counts as business mileage
This is where a bit of clarity really helps, because it’s easy to get wrong.
If the journey is for business purposes, you can usually claim it. That includes things like:
- Visiting clients
- Travelling to temporary work sites
- Travelling to networking events
- Picking up supplies or stock
- Running business errands like the bank or post office
What doesn’t count is your normal commute or anything personal. Even if it happens during the day, HMRC won’t allow it.
Most people have a mix of journeys, and that’s completely fine. You just need to make sure the business part is clearly recorded.
What records you actually need to keep
This part is simpler than people expect.
HMRC isn’t asking for anything complicated, but your records should tell a clear story. For each journey, you’ll want to capture:
- The date
- Where you travelled from and to
- The reason for the trip
- The number of miles
It doesn’t need to be perfect, but it does need to be consistent. If someone looked through your log, it should be obvious that the journeys are genuine business activity.
Making mileage tracking easy with MileIQ
You can track your mileage manually, but in reality, most people don’t stick with it for long.
At first, it seems simple enough. You jot down your journeys in a notebook or spreadsheet, keeping a note of where you went and why. The problem is, business gets busy. A few missed days turn into a few missed weeks, and suddenly you’re trying to remember trips from a month ago. That’s where mistakes creep in and, more often than not, you end up underclaiming.
That’s why many business owners switch to using an app like MileIQ instead.
Rather than relying on memory, MileIQ runs quietly in the background and automatically tracks your journeys using GPS. You don’t need to press start or stop. Every trip is recorded for you, and all you have to do is swipe to mark it as business or personal.
What makes MileIQ stand out is how simple and reliable it is:
- It captures every journey automatically, so nothing gets missed
- It reduces admin time to just a few minutes each week
- It helps you claim more accurately, so you don’t leave money on the table
What makes this approach work so well is how little effort it takes to maintain. Instead of trying to be perfect every day, you can spend a couple of minutes once a week reviewing your trips and adding a quick note, like the client name or reason for the journey.
Over time, this leads to much more accurate records. And because nothing gets missed, you’re far more likely to claim the full amount you’re entitled to.
Keeping everything organised with Xero
If you’re already using Xero, it’s worth bringing your mileage into that system as well.
Keeping everything in one place means your accounts stay up to date throughout the year. It also makes things much smoother when it comes to your tax return or working with your accountant.
Even if you’re using MileIQ separately, you can export your mileage reports and upload them into Xero, keeping your records clean and organised.
A simple routine the actually works
The key to all of this is keeping it realistic.
You don’t need a complicated system. You just need something you’ll stick to. For most people, that looks like:
- Letting MileIQ track journeys automatically
- Reviewing and categorising trips once a week
- Adding a quick note for business journeys
That small weekly habit keeps everything accurate and avoids a last-minute rush at year end.
Why it’s worth doing properly
Mileage tracking might seem like a small task, but it directly affects how much tax you pay.
Every missed journey is a missed claim. And because the HMRC rate is generous, those miles add up quickly over the year.
Once you’ve got a simple system in place, it becomes one of the easiest wins in your business finances.
Over time, this leads to much more accurate records. And because nothing gets missed, you’re far more likely to claim the full amount you’re entitled to.
If you’re not sure whether you’re tracking mileage the right way, or you want help getting everything set up properly in Xero, it might be worth having a quick chat.
Book a call and we’ll look at your current setup, spot any missed claims, and help you put a simple system in place that works for your business.
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