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Flat Invoice vs Affordable MTD

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Flat Invoice compared with Affordable MTD
Detail Flat InvoiceAffordable MTD logo Affordable MTD
What it doesSend the invoice. Skip the chasing. Simple Making Tax Digital software for sole traders and landlords
StageNot given Startup
FoundedNot given 2026
Based inUS GB
Pricing modelFreemium Freemium
Pricing3 invoices per month free, then $2 per invoice. Pro plan: $9 per month or $79 per year for unlimited invoices. Edits, resends and reminders are free. Free for the entire 2026-27 tax year (6 April 2026 to 5 April 2027). From 2027-28 onwards: £19.99 per year. No VAT currently added, no per-submission fees, no tiers.
Key features
  • Automatic payment reminders on day 3, 7 and 14
  • Late fee calculator with interest calculation
  • Ready-to-send reminder email templates
  • Direct client payments
  • Optional Stripe integration for card and bank payments
  • Free edits and resends
  • Free late fee calculator tool
  • Unlimited invoice drafts on free plan
  • Quarterly updates for self-employment income
  • Quarterly updates for UK property income including residential finance costs
  • CSV and Excel import with column mapping
  • AI categorisation of transactions into HMRC categories
  • AI pre-submission review to catch errors before HMRC
  • Standard or calendar quarters, chosen per tax year
  • Annual adjustments and final declaration
  • HMRC Assist feedback shown with tax estimate
  • Audit-ready records with timestamps and references
  • Consolidated expenses support for turnover under £90,000
What makes it different
  • Never touches client payments or takes a percentage
  • Automatic reminders reduce payment chasing
  • Free late fee calculator included with service
  • Simple pricing with no setup fees
  • Simplest MTD software, built specifically for sole traders and landlords
  • No banking, VAT, invoicing or payroll - just the tax bit
  • AI automatically sorts expenses into HMRC categories
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check5 +1 (up) since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)1220
Referring domains (Majestic)313

6 details filled in for both companies.

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