The gap nobody talks about
Everyone says "use a bridging tool". Nobody explains what happens to your Excel spreadsheet first.
Your bookkeeping lives in Excel
Thousands of UK sole traders track income and expenses in a spreadsheet. It works — until MTD requires something different.
MTD requires quarterly digital submissions
From April 2026, you must submit quarterly summaries to HMRC. A bridging tool does the submission. But first, the data must be right.
Bridging tools assume clean data
Most bridging tools expect structured, categorised transactions — not a raw spreadsheet with merged cells, blank rows, and ambiguous entries.
TaxPrepUK sits between your spreadsheet and your bridging tool.
We clean, classify, and validate — so your quarterly submission is error-free.
Three steps. Fifteen minutes.
Compare that to the 4–6 hours it currently takes manually.
Upload
Drop your Excel or CSV file
Drag and drop any .xlsx, .xls, or .csv file. TaxPrepUK detects your date, description, and amount columns automatically.
Classify
We suggest, you confirm
Our keyword classifier suggests MTD ITSA categories for each transaction. You review and confirm — or override anything with one click.
Export
Download MTD-ready file
Get a clean CSV or Excel workbook with all transactions categorised, validated, and ready to import into your bridging tool.
Your data stays in your browser
Your spreadsheet is processed entirely on your device. We never see your tax numbers. Nothing is uploaded to our servers.
No HMRC credentials needed
TaxPrepUK doesn't connect to HMRC's API. No government login, no agent authorisation, no data sharing.
Works with any bridging tool
Compatible with 123Sheets, VitalTax, AbraTax, GoSimpleTax, and any tool that accepts standard CSV or Excel import.
Simple, transparent pricing
Start free. Upgrade when you need more.
Free
See what TaxPrepUK can do — no card needed.
- ✓1 export per month
- ✓Self-employment or property income
- ✓CSV export (row-level)
- ✓7 automated health checks
- ✓1 session in history
- ✓Community support
- ✕Excel export
- ✕Health Check PDF
- ✕Unlimited history
All plans include a 14-day money-back guarantee. Cancel anytime.
Frequently asked questions
Everything you need to know before getting started.