Category
Tax & Compliance
This section brings together guides on tax authority rules, filing deadlines and digital compliance across the United Kingdom, France and Germany. You will find deep dives on HMRC Making Tax Digital (MTD) for VAT and future Income Tax Self Assessment, French DGFiP TVA declarations including CA3 and CA12 regimes, and German ELSTER workflows. We write for founders, finance managers and accountants who need accurate, practical explanations — not generic marketing fluff. Whether you operate in one country or several, the posts here help you understand what must be filed, when, and how modern software removes manual rework. Bookmark this category if you are building a cross-border finance stack or migrating from spreadsheets to compliant digital records.
7 articles
Making Tax Digital for landlords: complete guide for 2027
MTD for Income Tax Self Assessment is mandatory for landlords from April 2027 if your rental income exceeds £30,000. Quarterly digital updates replace the annual Self Assessment return. Here is exactly what you need to do — and how to prepare now.
CIS deductions explained: complete guide for UK subcontractors 2026
The Construction Industry Scheme requires contractors to deduct tax from subcontractor payments before they are made. This guide explains the three deduction rates, how to register, when to file CIS300, and how to reclaim overpaid CIS tax at year-end.
How to file your Self Assessment tax return online: 2026 guide
Who needs to file a Self Assessment, the key HMRC deadlines, how to file online step by step, and how Making Tax Digital changes it from April 2026. A plain-English guide for sole traders and landlords.
MTD for Income Tax Self Assessment: what sole traders and landlords need to know in 2026
HMRC's MTD ITSA is the biggest change to UK self-assessment in a generation. From April 2026, sole traders and landlords above £50,000 must submit quarterly updates via compatible software. Here's exactly what that means.
UK payroll: PAYE, National Insurance and RTI explained
PAYE, National Insurance and Real Time Information — everything a small employer in the UK needs to know, and how Marchant keeps your payroll and your books in step.
VAT registration thresholds in the UK, France and Germany
Miss your VAT registration deadline and you owe backdated VAT plus penalties. Here are the current thresholds across the UK, France and Germany — and what to do once you cross one.
How to file your VAT return via HMRC Making Tax Digital
HMRC Making Tax Digital is now mandatory for most VAT-registered businesses in the UK. Here's everything you need to know — and how Marchant makes it two clicks.
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