About ArcTax
ArcTax is software designed specifically for UK sole traders, landlords, and tax agents who need to comply with HMRC's Making Tax Digital programme — without the overhead of a full accounting platform.
Our mission
HMRC is replacing the annual Self Assessment return with quarterly digital reporting. From April 2026, sole traders and landlords above the income threshold must submit quarterly updates using recognised software — and file a Final Declaration at year end.
We are building ArcTax as a focused MTD service for individual taxpayers. ArcTax is currently in sandbox testing and is not yet HMRC recognised or enabled for live submissions.
Purpose-built for MTD ITSA
Not a generic accounting tool with MTD bolted on. Every feature exists to support quarterly submissions and Final Declarations.
HMRC sandbox integration
The OAuth 2.0 and API integration is currently being tested in HMRC's sandbox before production access is requested.
Affordable for individuals
Starting at £10/month for solo taxpayers. No hidden fees, no annual contracts, no features you will never use.
Bridging software included
Keep your existing spreadsheets. Upload a CSV each quarter and we handle the HMRC submission automatically.
The product
ArcTax is being built to cover the complete MTD ITSA workflow. The features below remain subject to HMRC production access and recognition.
Obligation tracking
See every open quarterly deadline pulled live from HMRC. Never miss a submission.
Self-employment updates
Submit quarterly income and expense summaries for SA103 (Self Employment) direct to HMRC.
UK property updates
Report rental income and allowable expenses for UK property under SA105.
Foreign property
Submit quarterly updates for overseas rental income under SA106 (Foreign Income).
Bridging CSV import
Upload a CSV from any spreadsheet. We map your figures to HMRC categories and submit.
Final Declaration
Complete the year-end filing that replaces the traditional Self Assessment SA100 return.
Agent portal
Manage multiple clients, view their obligations, and submit on their behalf from one dashboard.
Submission history
Every submission stored with HMRC reference numbers, payloads, and confirmation status.
Live tax calculation
Trigger an on-demand tax estimate from HMRC at any point in the year.
Who we help
Freelancers, contractors, tradespeople, and anyone running their own business who needs to submit quarterly self-employment income updates and file a Final Declaration.
MTD for sole traders →UK and foreign property landlords who need to report rental income quarterly — whether you own one property or several, with or without a mortgage.
MTD for landlords →Accountants and bookkeepers who manage MTD obligations on behalf of multiple clients. ArcTax provides a multi-client agent portal with per-client submission history and obligation tracking.
Agent plan →Our values
Simplicity first
MTD compliance does not need to be complicated. We remove everything unnecessary and make the essential steps as clear as possible.
Direct, not delegated
ArcTax connects to HMRC directly. We do not route your data through third-party intermediaries. Your submissions go straight to HMRC's APIs.
Honest about scope
We built a focused MTD tool — not an all-in-one accounting platform. If you need full bookkeeping, payroll, or VAT, we will tell you honestly rather than overpromise.
Priced fairly
Tax compliance software should not cost more than the tax you are trying to report. We keep pricing transparent and cancel-any-time.
Get in touch
If you have questions about ArcTax, MTD compliance, or your account, we are here to help.