---
title: "Trigger a Business Source Adjustable Summary"
method: POST
path: "/individuals/self-assessment/adjustable-summary/{nino}/trigger"
---

# Trigger a Business Source Adjustable Summary

`POST /individuals/self-assessment/adjustable-summary/{nino}/trigger`

This endpoint allows a developer to generate an end of accounting period Business Source Adjustable Summary of the 
income and expenditure for a specified business for a given accounting period. A Business Source Adjustable Summary 
must be generated before accounting adjustments are to be entered. A National Insurance number must be provided.

<strong>
  Note: For tax years before 2025-26, data can be submitted for UK FHL or Non-FHL, Foreign EEA-FHL or Non-FHL property business types. From tax year 2025-26 onwards, the UK FHL, UK Non-FHL, Foreign EEA-FHL and Non-FHL property types are no longer valid and you must use the UK Property or Foreign Property type.
</strong>  

### Test data
Scenario simulation using Gov-Test-Scenario headers is only available in the sandbox environment.  

|Tax year        | Header Value (Gov-Test-Scenario) | Scenario                                                                                                                     |
|----------------|----------------------------------|------------------------------------------------------------------------------------------------------------------------------|
|ALL             | N/A - DEFAULT                    | Simulates success response.                                                                                                  |
|ALL             | NO_ACCOUNTING_PERIOD             | Simulates the scenario where the supplied accounting period does not exist.                                                  |
|ALL             | OBLIGATIONS_NOT_MET              | Simulates the scenario where obligations for the business have not been met.                                                 |
|ALL             | ACCOUNTING_PERIOD_NOT_ENDED      | Simulates the scenario where the supplied accounting period has not ended.                                                   |
|2025-26 onwards | OUTSIDE_AMENDMENT_WINDOW         | Simulates the scenario where request cannot be completed as it is outside the amendment window.                              |
|ALL             | NOT_FOUND                        | Simulates the scenario where no data is found.                                                                               |
|ALL             | TAX_YEAR_NOT_SUPPORTED           | Simulates the scenario where the tax year is not supported.                                                                  |
|ALL             | REQUEST_CANNOT_BE_FULFILLED      | Simulates the scenario where the request cannot be fulfilled for various reasons other than the ones triggering other errors.|
|ALL             | STATEFUL                         | Performs a stateful trigger.                                                                                                 |

## Path parameters

- `nino` string, required

## Headers

- `Accept` 'application/vnd.hmrc.7.0+json', required
- `Content-Type` 'application/json', required
- `Authorization` string, required
- `Gov-Test-Scenario` string

## Request body

- union
  - object — Trigger a Business Source Adjustable Summary (BSAS)
    - `accountingPeriod` object, required — The duration of the business income source operations to be included in the tax year submission. The earliest tax year to which the accounting period can be assigned is 2019-20 for self-employment and UK property, and for foreign property, it is 2021-22. Note: <b>Accounting period start and end dates should not be displayed to users of your software.</b>
      - `startDate` string, date, required — The date the accounting period started. This date must fall on the 6th of April.
      - `endDate` string, date, required — The date the accounting period ended. The accounting period must end on the 5th of April in the tax year to which it is assigned. For Making Tax Digital (MTD) submissions, the earliest tax year in which an accounting period can end is 2019-20 for self-employment and UK property, and for foreign property, it is 2021-22.
    - `typeOfBusiness` 'self-employment' | 'uk-property-fhl' | 'uk-property' | 'foreign-property-fhl-eea' | 'foreign-property', required — The type of business the summary calculation is for.
    - `businessId` string, required — An identifier for the business, unique to the customer.
  - object — Trigger a Business Source Adjustable Summary (BSAS)
    - `accountingPeriod` object, required — The duration of the business income source operations to be included in the tax year submission. The earliest tax year to which the accounting period can be assigned is 2019-20 for self-employment and UK property, and for foreign property, it is 2021-22. Note: <b>Accounting period start and end dates should not be displayed to users of your software.</b>
      - `startDate` string, date, required — The date the accounting period started. This date must fall on the 6th of April.
      - `endDate` string, date, required — The date the accounting period ended. The accounting period must end on the 5th of April in the tax year to which it is assigned. For Making Tax Digital (MTD) submissions, the earliest tax year in which an accounting period can end is 2019-20 for self-employment and UK property, and for foreign property, it is 2021-22.
    - `typeOfBusiness` 'self-employment' | 'uk-property' | 'foreign-property', required — The type of business the summary calculation is for.
    - `businessId` string, required — An identifier for the business, unique to the customer.

## Response `200`

Success

- object — Trigger a Business Source Adjustable Summary
  - `calculationId` string, required — The unique identifier of the summary calculation.

## Other responses

- `400` — Bad request
- `403` — Forbidden
- `404` — Not Found
- `422` — Unprocessable Entity

---

[API](https://skmtc.net/hmrc/apis/business-source-adjustable-summary-mtd.md) · [All operations](https://skmtc.net/hmrc/apis/business-source-adjustable-summary-mtd/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/hmrc/business-source-adjustable-summary-mtd/versions/f75077f50003/schema)