Keep your spreadsheet, stay legal: bridging into MTD
Fifteen years of your accounts live in one beautiful Excel file, and MTD is not going to take that away from you. Here's how spreadsheets survive — properly.
The rule
MTD requires digital records and digital submission. A spreadsheet satisfies the first. For the second, the numbers must flow into HMRC's systems through recognised bridging software via digital links — formulas, imports, API connections. The one thing you cannot do is manually retype figures from the spreadsheet into something else.
How bridging actually works
- You keep recording income and expenses in your spreadsheet, as now — but with each transaction as a row, categorised, not just year-end totals.
- A summary sheet totals the categories with formulas (that's a digital link).
- Bridging software reads that summary — by opening the file, importing a CSV, or an add-in — and submits it as your quarterly update.
- At year end, the final declaration goes the same way (check your bridge includes it — many free tiers don't).
Where it bites
- Discipline is on you. The bridge files whatever the spreadsheet says, four times a year, per business. Categorisation errors, broken formulas and January archaeology remain your hobby.
- Two businesses, two sets of updates. Sole trade plus a rental property means keeping both straight, every quarter.
- Copy-paste is a compliance breach, not a shortcut. If your "system" involves retyping numbers, it isn't MTD-compliant.
Spreadsheet or software? A fair test
If maintaining the spreadsheet takes you under an hour a quarter and you enjoy the control — bridge it and carry on. If each quarter means an evening of dread, the spreadsheet is a habit, not a system. NippyTax is being built for exactly that person: the simplicity of a spreadsheet, with the categorising, checking and filing done for you. Join the waitlist and tell us what you'd pay — it shapes what we build.
Frequently asked questions
Can I still use a spreadsheet under MTD?
Yes. Spreadsheets count as digital records, provided the figures travel to HMRC through bridging software using digital links — formulas, imports or API connections. What is banned is retyping totals into a website or another program by hand.
What is bridging software?
A small tool that reads totals from your spreadsheet and submits them to HMRC as your quarterly update. Your spreadsheet stays the record; the bridge does the filing. It must be HMRC-recognised software.
What counts as a digital link?
A transfer of data with no manual re-keying: cell references and formulas within or between spreadsheets, CSV import/export, or an API connection. Copy-and-paste of values is explicitly not a digital link in HMRC’s rules.
Is bridging software just a VAT thing?
Bridging became popular under MTD for VAT and the same approach is recognised for Income Tax quarterly updates. The difference is volume: Income Tax means four updates per business per year plus a final declaration, so the spreadsheet discipline matters more.
Will bridging still be allowed in future?
HMRC has not announced any end date for bridging under MTD for Income Tax. It is a recognised, legitimate route — just one that leaves the record-keeping burden entirely on you.
Get NippyTax when it launches
We are building the simplest possible way to do MTD quarterly updates — no accounting suite, no jargon. Join the waitlist and be first in when it launches.