Who needs to submit a BBSI return?

Banks, building societies, and other financial institutions that pay interest to account holders are required to report that interest to HMRC. The obligation applies regardless of the number of accounts involved, and the return must accurately attribute interest to each account holder. Missing or misreporting this information risks rejected returns and HMRC scrutiny.

Does ARKK integrate with existing banking and data systems?

Yes. The ARKK Automation Platform is source-agnostic, connecting to data from any system, whether a core banking platform, ERP, or spreadsheet-based process. Data is ingested once and reused across multiple reporting obligations, removing the need to re-extract or reformat it for each return.

What are the risks of managing BBSI reporting manually?

Manual, spreadsheet-based BBSI processes increase the risk of calculation errors, miscategorised account data, and rejected returns, particularly as volumes grow near the filing deadline. Attributing interest incorrectly to account holders can trigger HMRC queries and rework. Automating data aggregation and calculation reduces these risks while keeping you ready for the 30 June deadline.

BBSI Reporting

The ARKK Automation Platform pulls together your interest payment data by account holder and produces a submission-ready BBSI (Bank and Building Society Interest) return for HMRC, with automated checks catching inconsistencies before you file.

BBSI returns fall due on 30 June each year, unless HMRC's notice says otherwise, leaving little margin for last-minute errors. Institutions still working from spreadsheets and basic bridging tools often carry more risk than they realise. ARKK closes that gap, giving your team a return they can trust well ahead of the deadline.

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Save time

Interest calculations run automatically against your built-in rules, cutting manual workload and reducing reliance on key personnel.

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Maximise value

A source-agnostic, cloud-based platform with unlimited users gives every reviewer visibility without added licence costs.

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Mitigate risk

ISO 27001 certification and machine learning checks catch inconsistent account records before submission.

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Gain visibility

Power BI dashboards give real-time visibility into interest and reportable balances by account and entity, so teams can review figures before submission.

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Stay compliant

Submission-ready returns are built to HMRC requirements and filed on time, well ahead of the 30 June deadline.

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Plan ahead

The Platform scales with your book, absorbing rising account volumes and reportable balances without slowing down.

The information that came back from ARKK was so clear and transparent.

Kreeson Thatiha, Head of Finance and Client Money, eToro

I was continually reassured of ARKK's technology and their commitment to customer service.

Darryl Alford, Finance Manager, DPD

ARKK were prepared to be more flexible with how we worked and how we were set up.

Alistair McClelland, Head of Tax, The University of Edinburgh

Simply outstanding service and a real pleasure to work with.

Chris Parsons, Production Director, Radley Yeldar

ARKK are extremely responsive and supportive partners.

Janette Moriarty, Group Financial Reporting Director, Kerry Group

ARKK are invaluable to us… I wouldn't consider another project without them.

Valentin Ramousse, Head of International Business Development & Partner, Emperor Works

The speed and accuracy of implementation was incredible.

Akash Kalaiya, EMEA Tax Manager, Universal Weather and Aviation

+ What is BBSI reporting?

BBSI (Bank and Building Society Interest) reporting is a UK requirement for financial institutions to report interest paid to account holders to HMRC, helping ensure the correct tax is applied on savings income. Institutions must submit details of interest payments by account holder within the reporting deadline set by HMRC. Compliance is annual, with a filing deadline of 30 June each year unless HMRC's notice states otherwise.

+ How does ARKK automate BBSI compliance?

The ARKK Automation Platform delivers the complete process in four steps: aggregating interest payment data from any source system into a single governed environment, calculating reportable balances and values per account holder, filing a submission-ready return directly with HMRC, and providing enterprise-grade governance and a full audit trail across every stage. The platform is modular, so institutions can implement the full end-to-end process or simply the final filing conversion.

+ How does ARKK automates BBSI compliance?

+ Does ARKK integrate with existing account and data systems?

Yes. The ARKK platform is source-agnostic, connecting to data from any system, whether an ERP, banking system feed, or spreadsheet-based process. Data is ingested once and reused across multiple reporting processes without limits on volume or complexity, removing the need to re-extract or reformat data for different obligations.

+ How is data secured on the ARKK platform?

ARKK software is ISO 27001 certified, the internationally recognised standard for information security management. The platform includes customisable workflows, defined team roles, and built-in validations, ensuring that access controls and data integrity are maintained throughout the reporting lifecycle.

+ What are the risks of managing BBSI manually?

Many institutions still manage BBSI through spreadsheet templates with scattered ownership and limited controls. As scrutiny intensifies, these approaches create material risk: calculation errors and miscategorised account data lead to rejected returns, and manual processes struggle to scale as account volumes grow. Getting it wrong close to the 30 June deadline leaves little time to correct and resubmit.

How ARKK automates BBSI reporting

Aggregate

Calculate

File

Govern

How the ARKK Automation Platform works