Tax spreadsheet and allowable expenses for Mobile Mechanics (UK sole traders)

These are common examples. A cost is allowable only if it is wholly and exclusively for your business, so check GOV.UK guidance on expenses if you are self-employed, or ask an accountant.

• Tools and diagnostic equipment may be allowable
• Van costs or mileage may be allowable
• Parts bought for jobs may be allowable
• Insurance may be allowable
• Training to update existing skills may be allowable
• Business share of phone may be allowable

• Leaving parts receipts separate from the job sheets for the repairs.
• Mixing parts bought for jobs with personal purchases.
• Combining business and personal van or phone use in one record.
• Using both mileage and actual van costs for the same vehicle.

• Job sheets showing work completed and parts used.
• Parts invoices and receipts linked to the relevant job sheets.
• Purchase and maintenance records for tools and diagnostic equipment.
• Mileage log with date, destination, purpose and distance.

Keep receipts, invoices and mileage details as you work, and record business and personal use separately where needed. Organised records make it easier to prepare your Self Assessment return.