Self Employment Income
This guide explains how to manage your self employment income submissions in My Tax Digital, including adjustable summaries and annual adjustments & allowances.
1. The Self Employment Income Hub
The Self Employment Income screen is the main management hub for a self employment business. From here you can navigate to all the submission areas for the business.
| Card | Description |
|---|---|
| Obligations | View open and fulfilled income & expense submission periods. |
| Income & Expenses | Retrieve and review previously submitted cumulative income and expense figures. |
| Adjust Income & Expenses | Submit or update an Adjustable Summary — a HMRC-required end-of-year adjustment to your cumulative figures. |
| Adjustments & Allowances | Submit annual adjustments and capital allowances, including Structures and Buildings Allowances. |
| Periods of Account | View and manage periods of account for this income source. |
The hub also shows the current Reporting period and Submission mode (Accounting or Bridging).
2. Adjustable Summaries
An Adjustable Summary (BSAS — Business Source Adjustable Summary) is a year-end submission to HMRC that allows you to adjust the cumulative income and expense figures already submitted for a period. It is required before your final tax calculation can be performed.
2.1 The Adjustable Summaries List
The list shows all adjustable summaries for this business, each identified by its submission period and the date it was requested.
Click + New to trigger a new adjustable summary from HMRC, or click an existing entry to view or update it.
2.2 Viewing an Adjustable Summary
The view screen shows a read-only summary of the adjusted figures calculated from your submissions.
| Field | Description | SA103F |
|---|---|---|
| Outstanding business income | Other business income not included in turnover. | Box 75 |
| Adjusted profit | Net profit after all adjustments and allowances have been applied. | Box 73 |
| Taxable profit | The final taxable profit figure reported to HMRC. | Box 76 |
Click Prepare update to unlock the fields for editing.
2.3 Updating an Adjustable Summary
When updating an adjustable summary in Bridging mode, you provide the adjusted income and expense figures directly.
Submission details
First, indicate whether adjustments are required:
- Yes — I would like to make some adjustments to my figures: Opens the income and expenses fields for editing.
- No — I wish to submit this form with no adjustments: Submits a zero-adjustment return.
Income
| Field | Description | SA103F |
|---|---|---|
| Turnover | The total takings, fees, sales or money earned by the business. | Box 15 |
| Other | Any other business income not included in turnover. | Box 16 |
Expenses
Choose how to submit your expenses:
- Consolidated — Submit a single combined figure for all expenses.
- Granular — Submit individual expense categories. Also requires disallowable expense amounts for each category.
Granular expense categories include: Premises running costs, Maintenance costs, Admin costs, Interest on bank and other loans, Finance charges, Irrecoverable debts, Professional fees, Depreciation, Advertising costs, Business entertainment costs, and Other expenses.
3. Adjustments & Allowances
The Adjustments & Allowances screen is where you record your annual capital allowances, tax adjustments, and non-financial disclosures. This corresponds to the capital allowances and adjustments sections of your SA103F (Self Employment — Full) supplementary page.
3.1 Viewing Adjustments & Allowances
The view screen shows all currently submitted allowance and adjustment figures.
Click Prepare update to unlock editing.
3.2 Updating Allowances
The Allowances section covers capital allowances claimable for the tax year.
| Field | Description | SA103F |
|---|---|---|
| Trading income allowance | The £1,000 trading income allowance, if claimed instead of actual expenses. | Box 16.1 |
| Annual investment allowance | 100% first-year allowance on qualifying plant and machinery. | Box 49 |
| Capital allowance main pool | Allowances at 18% on plant and machinery in the main pool. | Box 50 |
| Capital allowance special rate pool | Allowances at 6% on assets in the special rate pool (e.g. integral features, high-emission cars). | Box 51 |
| Zero emissions goods vehicle allowance | 100% allowance on new zero-emission goods vehicles. | Box 52 |
| Zero emissions car allowance | 100% first-year allowance on new zero-emission cars. | Box 52.1 |
| Enhanced capital allowance | Other 100% and enhanced first-year allowances. | Box 55 |
| Business premises renovation allowance | Allowance for the renovation of qualifying business premises. | Box 55 |
| Allowance on sales | Allowances arising on the sale or cessation of business use of an asset. | Box 56 |
| Capital allowance single asset pool | Allowances on assets held in a single-asset pool (e.g. certain cars). | Box 50/51 |
| Electric charge-point allowance | 100% first-year allowance on new electric vehicle charging equipment. | Box 54 |
Structured Building Allowances (SBAs)
SBAs are listed separately below the standard allowances. Each entry shows the building name, postcode, and allowance amount. Click + Add to add a new SBA, or click an existing entry to edit it.
Enhanced Structured Building Allowances
A separate section lists Enhanced SBAs (for Freeport and Investment Zone structures). These follow the same format as standard SBAs.
3.3 Adding or Editing a Structured Building Allowance Item
| Field | Description | SA103F |
|---|---|---|
| Amount | The SBA amount being claimed for this tax year. | Box 53 |
| Is this the first year? | Select Yes if this is the first year the allowance is being claimed for this building. | - |
| Qualifying date | The date the building first came into qualifying use (only shown when first year = Yes). | - |
| Amount expenditure | The total qualifying expenditure on the building (only shown when first year = Yes). | - |
| Building name | The name of the building. | - |
| Building number | The building number (optional). | - |
| Building postcode | The postcode of the building. | - |
Click Delete to remove an existing SBA entry.
3.4 Updating Adjustments
The Adjustments section covers year-end profit adjustments.
| Field | Description | SA103F |
|---|---|---|
| Balancing charge BPRA | Balancing charge arising on Business Premises Renovation Allowance. | Box 59 |
| Balancing charge other | Other balancing charges on the sale or cessation of use of assets. | Box 59 |
| Goods and services own use | The value of goods or services taken from the business for personal use. | Box 60 |
| Included non-taxable profits | Income included in your accounts that is not taxable as business profit and should be deducted. | Box 62 |
| Basis adjustment | Adjustment where the accounting period ended before 31 March or was not 12 months long. | Box 68 |
| Accounting adjustment | Adjustment for a change of accounting practice (e.g. moving from cash to accruals basis). | Box 71 |
| Averaging adjustment | Applies only to farmers, market gardeners, and creators of literary or artistic works. | Box 72 |
| Transition profit amount | The amount of transition profit arising in this tax year from the basis period reform. | Box 73.3 |
| Transition profit acceleration amount | Any additional transition profit brought forward under an election to accelerate. | Box 73.3 |
| Outstanding business income | Any other business income not already included in your income or expense submissions. | Box 75 |
Non-financials
| Field | Description |
|---|---|
| Has business details changed recently? | Indicate whether the business details (e.g. name, address, nature of trade) have changed during the tax year. |
| Case 4 NCS exemption reason | If you are claiming an exemption from the National Insurance Class 4 contributions charge, enter the reason here. |
4. Periods of Account
A period of account is the 12-month window a business uses to prepare its annual accounts — for example, 1 January to 31 December, or 6 April to 5 April.
Most self-employed businesses use the standard tax year (6 April to 5 April, or with an accounting date of 31 March which HMRC treats as equivalent). If your accounts run to 31 March or 5 April you can answer No to the "Does this business have periods of account?" question — HMRC already knows your period aligns with the tax year.
Businesses with a different year-end — for example, accounts running to 31 December or 30 September — need to declare their specific accounting period dates. This became important following HMRC's basis period reform (from tax year 2024-25 onwards), which changed the rules so that all self-employed businesses are taxed on profits arising within the tax year itself (6 April to 5 April), regardless of when their accounts end. To calculate the correct apportioned profit, HMRC needs to know the exact start and end dates of your accounting period.
HMRC requires this information to be on record before an Intent to Finalise calculation can be submitted. Use this screen to submit or update your periods of account.
For further background, see HMRC's MTD ITSA service guide — Basis period reform: Capture Period of Account.
4.1 The Periods of Account Screen
The overview shows whether periods have been submitted for the current tax year.
- If no data has been submitted to HMRC yet, a No data submitted notice is shown.
- Click Submit periods of account to open the submission form.
4.2 Submitting Periods of Account
The submission form asks whether this business has periods of account with specific start and end dates.
| Option | Description |
|---|---|
| Yes | The business has periods of account with specific start and end dates. You must add at least one date range. |
| No | The business does not have periods of account. |
Select Yes to reveal the Date ranges section, then click + Add to enter a period:
| Field | Description |
|---|---|
| Start date | The first day of the accounting period. |
| End date | The last day of the accounting period. |
Click Submit in the modal to save the date range, then click Submit on the main form to send the periods to HMRC.
Select No if the business does not use specific accounting periods:
Click Submit to confirm.
After the tax year ends, the period type selection is shown as read-only. The selected option remains visible so you can see what was configured, but it cannot be changed — HMRC does not accept period type changes for a completed tax year.
