Full MTD software manages your records and submits to HMRC within one system. Bridging software only handles the submission part, it takes numbers from a spreadsheet you still maintain yourself and sends them to HMRC. Both are compliant, they just split the work differently, as confirmed in HMRC’s guidance on choosing the right software.
How full MTD software works
Everything happens in one place: transactions come in through a bank feed, get categorised (often automatically), and are submitted directly to HMRC at the end of each quarter. with no separate spreadsheet involved at all.
How bridging software works
Your spreadsheet remains the primary record. The bridging tool reads specific cells and submits them to HMRC, preserving the required digital link. You’re still responsible for keeping the spreadsheet itself accurate and up to date.
Pros and cons of each approach
| Full MTD software | Spreadsheet + bridging software | |
| Setup effort | Slightly more upfront (connecting bank feeds, categories) | Minimal – keep using your existing spreadsheet |
| Ongoing effort | Largely automated after setup | Manual entry and categorisation stays with you |
| Error risk | Lower – automated categorisation reduces manual mistakes | Higher – depends entirely on your own spreadsheet accuracy |
| Best for | Multiple income sources, multiple properties, less time to spare | A single, simple income source and comfort with spreadsheets |
Which is right for you?
If your situation is simple, one income source, one property, figures you’re confident tracking by hand, bridging software is a perfectly reasonable, lower-cost route. If you’re managing multiple income sources or properties, full MTD software removes the manual step where most errors actually happen.
How does CleanBooks AI fit into this?
CleanBooks AI sits firmly on the full-software side of this comparison. If you’re currently on a spreadsheet-and-bridging setup, our guide to switching accounting software for MTD covers moving across without losing historic records, and our dedicated spreadsheet-switching guide walks through the process step by step.
See what full automation actually looks like. Try CleanBooks AI free for 6 months.
