National Fraud Initiative: public-sector data specifications
Source: gov.uk (2025-11-13)

This guide sets out the dataset specifications for the National Fraud Initiative (NFI) 2024 to 2025 national exercise and NFI council tax single person discount 2024 to 2025 and 2025 to 2026 exercises.

Please note that data should:
- be extracted according to the National Fraud Initiative (NFI) timetables (https://www.gov.uk/government/publications/national-fraud-initiative-timetables)
- only be submitted through the secure NFI web application (https://www.nfi.gov.uk/)
- be password-protected once extracted from the relevant systems
- unless otherwise stated, do not include minors’ data.
Before submitting data, you must read the guidance on uploading data and the pre-upload checks you should carry out to ensure you are providing the best possible data.

The upload process automatically maps the fields in the file you are uploading by field name recognition. However, if there is no header row containing field names within the extracted data, the person uploading data will be required to manually map each field to the appropriate field on the data file upload screen. Therefore, it’s advisable to include field names in the header row within the data extract, if possible.

To find out who should supply data, refer to the data requirements (https://www.gov.uk/guidance/national-fraud-initiative-public-sector-data-requirements) guide.

Data specifications detailing the exact data we process for National Fraud Initiative pilots can be found at National Fraud Initiative: Pilot Data Specification (https://www.gov.uk/guidance/national-fraud-initiative-pilot-data-specifications)

Read more about uploading data to the NFI (https://www.gov.uk/guidance/uploading-data-to-national-fraud-initiative).

Changes for the 2024 to 2025 exercise

The NFI reviews data specifications before each exercise. Although changes have been kept to a minimum, some are necessary to improve the matching process and the quality of matches.

(https://assets.publishing.service.gov.uk/media/669a437afc8e12ac3edb000f/2024-05-09-Changes-to-Data-Specifications-24-25.pdf)

Changes for the 2024 to 2025 exercise (https://assets.publishing.service.gov.uk/media/669a437afc8e12ac3edb000f/2024-05-09-Changes-to-Data-Specifications-24-25.pdf)

PDF, 41.5 KB, 1 page

Trade creditors’ data specifications

Trade creditors’ standing data should:
- be a snapshot of trade creditors current at the date of extraction
- exclude dormant or suspended creditors
- cover the period given in the data specification
(https://assets.publishing.service.gov.uk/media/669a43adab418ab0555928c7/2024-05-09-Trade-Creditors-Standing-Data-Spec-24-25.pdf)

Trade creditors standing data: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/669a43adab418ab0555928c7/2024-05-09-Trade-Creditors-Standing-Data-Spec-24-25.pdf)

PDF, 60 KB, 3 pages

(https://assets.publishing.service.gov.uk/media/669a4a43ab418ab0555928d1/2024-05-09-Trade-Creditors-History-Data-Spec-24-25.pdf)

Trade creditors payment history data: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/669a4a43ab418ab0555928d1/2024-05-09-Trade-Creditors-History-Data-Spec-24-25.pdf)

PDF, 59.7 KB, 2 pages

Personal budgets data specification

Data should:
- relate to personal budget payments paid as direct payments to those applicants over 18 years of age only
- include only current recipients
- have one single record for each recipient
(https://assets.publishing.service.gov.uk/media/66b1ef38ce1fd0da7b593355/2024-04-26_FINAL_Personal_Budgets_Data_Spec_24_25.docx.pdf)

Personal budgets data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/66b1ef38ce1fd0da7b593355/2024-04-26_FINAL_Personal_Budgets_Data_Spec_24_25.docx.pdf)

PDF, 52.1 KB, 2 pages

Pensions data specification

Data should be uploaded in 3 separate files:
- current pensioners (those currently receiving a pension)
- pensioners receiving a pension gratuity (if applicable)
- deferred pensioners not currently in payment (optional)
(https://assets.publishing.service.gov.uk/media/66b1f6ddab418ab055593349/2024-04-24_FINAL_Pensions_Data_Spec_24_25.docx__1_.pdf)

Pensions: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/66b1f6ddab418ab055593349/2024-04-24_FINAL_Pensions_Data_Spec_24_25.docx__1_.pdf)

PDF, 63.1 KB, 5 pages

Payroll data specification

Payroll data should be provided following this data specification.

(https://assets.publishing.service.gov.uk/media/66e309cdbfc2fdc9641316bd/2024-09-12_FINAL_Payroll_Data_Spec_PUBLIC_SECTOR_24-25.pdf)

Payroll: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/66e309cdbfc2fdc9641316bd/2024-09-12_FINAL_Payroll_Data_Spec_PUBLIC_SECTOR_24-25.pdf)

PDF, 66.1 KB, 3 pages

Licences data specification

This specification includes licences for taxi drivers.

(https://assets.publishing.service.gov.uk/media/669a4692fc8e12ac3edb0010/2024-04-24-Taxi-Driver-Licence-Data-Spec-24-25.pdf)

Taxi driver licences: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/669a4692fc8e12ac3edb0010/2024-04-24-Taxi-Driver-Licence-Data-Spec-24-25.pdf)

PDF, 54.5 KB, 2 pages

Housing data specifications

Housing waiting list

The following housing waiting list data is required.

(https://assets.publishing.service.gov.uk/media/669a49a2fc8e12ac3edb0014/2024-04-06-Housing-Waiting-List-Data-Spec-24-25.pdf)

Housing waiting list: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/669a49a2fc8e12ac3edb0014/2024-04-06-Housing-Waiting-List-Data-Spec-24-25.pdf)

PDF, 47.9 KB, 1 page

Housing tenants

The housing data that should be uploaded includes:
- current named tenants, including those where a right to buy purchase is in progress
- former tenants who completed a right-to-buy application during the period stated in the data specification
(https://assets.publishing.service.gov.uk/media/669a49be0808eaf43b50d2cc/2024-04-26-Housing-Tenants-Data-Spec-24-25-.docx.pdf)

Housing tenants: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/669a49be0808eaf43b50d2cc/2024-04-26-Housing-Tenants-Data-Spec-24-25-.docx.pdf)

PDF, 67.1 KB, 3 pages

Electoral Register data specification

Electoral Register data should be submitted annually for the NFI mandatory single-person discount (SPD) fraud matching. Refer to the council tax single person discount timetable (https://www.gov.uk/government/publications/national-fraud-initiative-timetables).

The data should:
- be the ‘full version’ of the Electoral Register (not the commercially available ‘edited version’)
- relate to the appropriate registration exercise
- include the Unique Property Reference Number (UPRN) field in your submission if it is fully or partially populated
- be extracted and submitted after the Register is formally published
(https://assets.publishing.service.gov.uk/media/66e2ffba61763848f429d601/2024-04-26_FINAL_Electoral_Register_Data_Spec_24_25.pdf)

Electoral Registration: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/66e2ffba61763848f429d601/2024-04-26_FINAL_Electoral_Register_Data_Spec_24_25.pdf)

PDF, 51.8 KB, 2 pages

Council Tax data specification

Council Tax (CT) data should be submitted annually for the NFI mandatory single-person discount (SPD) fraud matching. Once both CT and ER data are uploaded, the NFI can generate your SPD matches (unless you encounter data issues that we need to resolve). You will not need to wait for all councils to submit their data.

View the NFI council tax single person discount timetable (https://www.gov.uk/government/publications/national-fraud-initiative-timetables). Please note that you are required to password-protect each dataset (https://www.gov.uk/guidance/uploading-data-to-national-fraud-initiative) once extracted from the relevant systems.

To find out who should supply council tax data, view the data requirements (https://www.gov.uk/guidance/national-fraud-initiative-public-sector-data-requirements).

The data should:
- include a date of birth if it is captured on your system, but we accept that this is not routinely stored.
- include surname and forename fields even if they are not fully populated, as they must be mapped for the upload to be accepted. If your CT system also includes an aggregated field that holds all name details, this data should also be provided so it can be mapped to the ‘Full name’ field.
- include the Unique Property Reference Number (UPRN) field in your submission if it is populated or partially populated
- only be current/live accounts
- relate to all CT accounts, whether or not there is a discount or exemption (i.e., it should cover every domestic property where CT applies)
(https://assets.publishing.service.gov.uk/media/692eb9fece50d215cae9631e/2025-07-04_Council_Tax_Data_Spec_25-26.docx__1_.pdf)

Council Tax: Data Specification 2025 to 2026 (https://assets.publishing.service.gov.uk/media/692eb9fece50d215cae9631e/2025-07-04_Council_Tax_Data_Spec_25-26.docx__1_.pdf)

PDF, 241 KB, 6 pages

Transport passes and permits data specification

The Blue Badge Digital Service (BBDS) will upload data on behalf of the local authorities that have opted for this service. Please check whether you have opted in with your Blue Badge teams. If you do not use the BBDS service, then you will need to extract and upload the data locally.

Please upload data in 3 separate files:
- current holders of a resident’s parking permit
- current holders of a blue badge (including local schemes)
- current holders of a concessionary travel pass (e.g., a Freedom pass)
(https://assets.publishing.service.gov.uk/media/66e2ff5d718edd81771316ab/2024-04-26_FINAL_Transport_Passes_and_Permits_Data_Spec_24_25.pdf)

Transport passes and permits: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/66e2ff5d718edd81771316ab/2024-04-26_FINAL_Transport_Passes_and_Permits_Data_Spec_24_25.pdf)

PDF, 61.8 KB, 4 pages

Private supported care home residents’ data specification

All data should relate to current care home residents, at the date of extract, who are receiving all or part of their funding from the Local Authority.

(https://assets.publishing.service.gov.uk/media/688b4359b9eb244980ebe684/NFI_Private_Supported_Care_Home_Data_Spec_24-25.docx.pdf)

Private supported care home residents: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/688b4359b9eb244980ebe684/NFI_Private_Supported_Care_Home_Data_Spec_24-25.docx.pdf)

PDF, 91.3 KB, 2 pages

Council Tax Reduction Scheme data specification

Data should be provided in accordance with the Council Tax Reduction scheme data specification.

(https://assets.publishing.service.gov.uk/media/669a4b0dab418ab0555928d4/2024-04-24-Council-Tax-Reduction-Scheme-Data-Spec-24-25.pdf)

Council Tax Reduction Scheme: data specification 2024 to 2025 (https://assets.publishing.service.gov.uk/media/669a4b0dab418ab0555928d4/2024-04-24-Council-Tax-Reduction-Scheme-Data-Spec-24-25.pdf)

PDF, 52.5 KB, 2 pages

Business Rates data specification

Business Rates data should be provided following this data specification, for FraudHub (http://www.gov.uk/guidance/national-fraud-initiative-additional-public-services#fraudhub) only

(https://assets.publishing.service.gov.uk/media/69159fc8eba5bda2026fc8a0/2018-06-06_Business_Rates_data_specification_-_FINAL__1_.pdf)

Business Rates data specification (https://assets.publishing.service.gov.uk/media/69159fc8eba5bda2026fc8a0/2018-06-06_Business_Rates_data_specification_-_FINAL__1_.pdf)

PDF, 201 KB, 3 pages

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