Calculating trade income: Sole traders and partners

1. GAAP

1.1. Accruals basis

1.1.1. May use cash basis

2. Capital expenditure

2.1. New assets

2.1.1. Build website

2.1.2. Initial franchise fee

2.1.3. Incidental expenditure

2.2. Improve existing assets

2.2.1. Modern materials okay

2.2.2. Special rules for integral features

2.3. Add back

2.3.1. Capital allowances?

3. Wholly and exclusively

3.1. Personal expenditure

3.1.1. Pension contributions

3.1.1.1. Extend basic rate band

3.1.2. Motor vehicle costs

3.1.2.1. Business use proportion

3.1.2.2. Mileage allowance

3.1.3. Use of home

3.1.3.1. Business use proportion

3.1.3.2. Simplified expenses

3.2. Other activities

3.2.1. Property business

4. Specific tax rule

4.1. Relief denied

4.1.1. Entertaining

4.1.2. Gifts

4.1.3. 15% Car hire

4.2. Relief delayed

4.2.1. Staff Pension accural

4.2.2. Staff bonus paid late

5. Partnerships

5.1. Add back salaries

5.2. Add back interest on capital

5.3. Expenses

5.3.1. Deduct at partnership level