Tax spreadsheet and allowable expenses for Builders (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 may be allowable
• Plant hire may be allowable
• Materials may be allowable
• Van or mileage may be allowable
• Insurance may be allowable
• Subcontractor costs may be allowable
• CIS-related record-keeping costs may be allowable

• Using both mileage and actual vehicle costs for the same vehicle.
• Keeping CIS statements apart from subcontractor job and payment records.
• Combining business and personal van use in one record.
• Leaving materials invoices disconnected from the job they relate to.

• CIS statements and subcontractor payment records.
• Job sheets and invoices with receipts for materials.
• Mileage log with date, destination, purpose and distance.
• Van and insurance records, with business and personal use recorded separately.

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.