Every year, Scottish sole traders overpay income tax because they don't claim all the expenses they're entitled to. Given that Scotland's intermediate rate kicks in at just £26,562 and the higher rate at £43,663, even modest unclaimed expenses at these thresholds can cost you hundreds of pounds. Here's the complete picture for 2025/26.
The Golden Rule: "Wholly and Exclusively"
HMRC allows deductions for costs incurred wholly and exclusively for the purpose of running your business. If an expense has a dual personal/business use, only the business portion is claimable — and you'll need to be able to justify the split. That said, mixed-use costs are still worth claiming correctly rather than not at all.
Common Allowable Expenses for Scottish Sole Traders
Home Office
HMRC's flat rate is £10/month for 25–50 hours per month, £18/month for 51–100 hours, or £26/month for over 100 hours. Alternatively, claim a proportion of actual costs (mortgage interest or rent, utilities, council tax) based on the number of rooms used.
Mileage & Travel
The approved mileage rate is 45p per mile for the first 10,000 business miles, then 25p per mile. Public transport fares for business journeys are also claimable. Commuting to a regular workplace is not claimable.
Equipment & Tools
Laptops, phones, tools, machinery and other equipment used for your business. Large purchases may be treated as capital expenditure and claimed via the Annual Investment Allowance (AIA) rather than as expenses.
Phone & Internet
If you use your personal phone or broadband for business, claim the business-use proportion. A sole trader using their phone 60% for business can claim 60% of their monthly bill.
Professional Fees
Accountancy fees, professional memberships, trade association subscriptions and any professional indemnity insurance paid specifically for your business are fully deductible.
Marketing & Advertising
Website costs, social media advertising, flyers, business cards and any paid promotion of your business. Subscriptions to business software (Xero, Canva, Adobe) also fall here.
Training & Development
Courses, books and subscriptions that maintain or improve skills directly relevant to your current trade are claimable. Training for a completely new career is not.
Protective Clothing & Uniforms
Uniforms, protective gear and specialist clothing required for your trade. Everyday clothing that could be worn outside work is not claimable, even if you only wear it for work.
The £1,000 Trading Allowance: Use it or Claim Expenses?
If your total self-employment income is under £1,000 in a tax year, you pay no tax on it and don't need to register for Self Assessment. If your income is above £1,000, you can choose to deduct the flat £1,000 trading allowance instead of actual expenses — but you can't do both. For most established sole traders with real expenses, claiming actuals will be far more tax-efficient.
Why expenses matter more in Scotland: At Scotland's intermediate rate of 21% (income £26,562–£43,662), every £1,000 of unclaimed expenses costs you around £210 in extra tax. At the higher rate of 42% (income above £43,663), that rises to £420 per £1,000 unclaimed.
What you cannot claim: Fines and penalties from HMRC or courts, personal clothing, food and drink (unless you're away from your normal place of work overnight), and non-business entertainment costs.
At Forever Accounting, we go through every client's expenses properly — not just the obvious ones. Most clients save more in additional claimed expenses than they pay in fees. Our sole trader accounting service starts from £75/month and includes year-round support. Get in touch for a free quote.
Make Sure You're Claiming Everything You're Entitled To
We handle Self Assessment for sole traders across Scotland. Most clients recoup their accountancy fee in unclaimed expenses alone.
Email: info@foreveraccounts.com · Glasgow & Edinburgh