FlashBill vs FreeAgent for UK CIS Contractors
FreeAgent is a solid UK accounting product — now owned by NatWest. But for CIS tradespeople who need invoicing without the full accounting suite, how do they compare?
| Feature | ⚡ FlashBill | FreeAgent |
|---|---|---|
| Starting Price | Free / £9/mo | £19/mo (50% off yr 1), then £38/mo |
| CIS Deduction Calculation | ✓ Native, automatic | ~ CIS module available |
| Domestic Reverse Charge VAT | ✓ Built in | ~ Available |
| Late Payment Act Notices | ✓ Automatic, 3 tones | ✗ Manual only |
| Free Plan | ✓ 5 invoices/month | ✗ Paid only |
| Free via NatWest/RBS | ✗ | ✓ Free with NatWest business account |
| MTD VAT Filing | ~ Business plan | ✓ All plans |
| Self Assessment Filing | ✗ | ✓ Included |
| Bank Feed Connection | ✗ | ✓ All major UK banks |
| Online Payments | ✓ Stripe, Apple/Google Pay | ✓ Stripe integration |
| Quotes | ✓ Starter+ | ✓ All plans |
FlashBill is better for
Pure invoicing — fast & CIS-first
- Instant CIS calculation without setup
- Automatic Late Payment Act notices
- Much lower price (£9 vs £38/mo)
- Free plan to start
- Designed for tradespeople, not accountants
FreeAgent is better for
Full UK accounting with HMRC filing
- Self Assessment filing built in
- MTD VAT submission
- Bank feed reconciliation
- Free if you bank with NatWest/RBS
- Full P&L and balance sheet
FreeAgent's Big Advantage: Free with NatWest
FreeAgent was acquired by NatWest in 2018. If you have a NatWest or RBS business bank account, FreeAgent is free — that's a genuine advantage. If you already bank with NatWest, FreeAgent is hard to beat for the price.
If you don't have a NatWest account, FreeAgent costs £19/month for the first year, then £38/month — four times the price of FlashBill for invoicing-only usage.
CIS: Similar Features, Very Different Prices
Both products support CIS deductions. FreeAgent's CIS module is solid and integrates with its accounting features. FlashBill's CIS is simpler — it's built directly into the invoice creation flow without requiring any accounting setup. For a sole trader who just wants to send correct CIS invoices quickly, FlashBill's approach is faster.
The Late Payment Advantage
One area where FlashBill genuinely stands out: automatic Late Payment Act notices. When an invoice goes overdue, FlashBill automatically sends reminders with the correct statutory interest calculated. FreeAgent doesn't do this — you'd send chaser emails manually. For tradespeople dealing with slow-paying contractors, this feature alone saves significant time.
The Verdict
If you bank with NatWest and want full accounting software with Self Assessment, get FreeAgent for free. If you want the simplest, most affordable CIS-compliant invoicing tool that automatically handles late payments, FlashBill is the better choice — and significantly cheaper.
The affordable FreeAgent alternative
£9/month for unlimited CIS invoicing. No bank account required. Free to start.
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