Bridging Software Won't Cut It for MTD Income Tax [UK]

Bridging software worked for MTD VAT. It won't work for MTD Income Tax.

Here's the problem: many firms use a spreadsheet plus a £8-per-month bridging tool to meet VAT obligations. The return goes through, HMRC accepts it, client's happy. But that's not compliance. That's just a submission link.

Bridging software connects Excel to HMRC's API. It transmits totals. It does not record individual transactions. It does not maintain a ledger. It does not operate on double-entry principles. For straightforward VAT returns with nine boxes to fill, this has been adequate.

MTD for Income Tax Self Assessment changes the rules from April 2026. It requires digital record keeping. Proper transaction records. Quarterly updates. The 4 million taxpayers caught in the initial rollout (those with income over £50,000, dropping to £30,000 later) cannot meet these requirements with a spreadsheet and a bridge.

What Full Accounting Software Actually Does

Full MTD-compatible software handles bank feeds, receipt capture, invoicing, and reconciliation. It maintains a proper audit trail. It automates 80-90% of what currently gets keyed in manually. HMRC lists over 100 compatible providers, from Xero to FreeAgent to various others.

The subscription costs more than bridging software. But the compliance gap is real. Manual data entry from spreadsheets introduces errors. Bridging tools offer no scalability when client volumes increase. They provide no management insights.

The Migration Question

Firms delaying full software adoption cite data migration costs and staff training time. Fair concerns. But April 2026 is not far away, and spreadsheet-based processes will not meet the substantive digital record-keeping requirements.

Bridging software served a purpose during MTD for VAT. That purpose has expired. Firms should audit their client base now, identify who falls under MTD Income Tax thresholds, and plan software transitions accordingly. The alternative is scrambling when HMRC enforcement begins.

This is not exciting. It is necessary.