SimpleTaxFlow

Get your figures in

MTD bridging software for your spreadsheet

SimpleTaxFlow is MTD bridging software: you keep your records in Excel or Google Sheets, upload your figures as a CSV file and send your quarterly update to HMRC.

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No card required until you are ready to submit to HMRC.

Who it is for

Sole traders and landlords who already keep their records in a spreadsheet and want to keep doing so.

What it does

  • Upload one CSV file for each business and tax year, with your figures for the tax year so far.
  • Works for self-employment and for UK property you own on your own.
  • Uploading again replaces your last upload, so a corrected file is easy to send.
  • Shows the figures HMRC will receive before you send them.

Not supported yet

  • Jointly owned property is added in Money, not by spreadsheet.
  • Foreign property is not supported yet.

How it works

  1. Upload or add your figures

    Save your spreadsheet as CSV and upload it in your quarterly update.

  2. Check your figures

    See your income, expenses and profit exactly as HMRC will receive them.

  3. Submit

    Send your update to HMRC. We keep a copy of what you sent.

Example: Sam, a self-employed decorator (fictional)
Figures up to
5 July 2026
Income
£12,480
Expenses
£2,741
Profit
£9,739

Sam keeps a Google Sheet, saves it as CSV and uploads it for the first quarterly update.

Questions about bridging software

Quarterly updates and your tax return. All included.

£29.99 + VAT a year. No card required until you are ready to submit to HMRC. Renews each year. Cancel renewal any time.

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