The Forensix Blog

UK + Spain tax for British expats and autónomos — in plain English.

2026-08-11

Making Tax Digital for Income Tax: what actually changes for sole traders in 2026

MTD for Income Tax started in April 2026 for sole traders and landlords earning over £50,000. What you have to do, when the four quarterly deadlines fall, what software you need, and what it does not do for you.

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2026-08-11

The expenses self-employed people forget to claim (and what they cost you)

The allowable expenses UK sole traders most often miss on a Self Assessment return, why they get missed, what each one is worth in real tax, and how to find yours in a bank statement.

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2026-07-05

Gestor, XOLO or Forensix: which do you actually need?

An honest comparison for British freelancers in Spain: full-service platforms like XOLO, a traditional gestor, and Forensix solve different problems. Which layer you need, what each costs, and how they combine.

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2026-06-20

Do you need a gestor, or can you file Spanish tax yourself?

An honest look at whether a British expat in Spain needs a gestor or can handle their own IRPF and autónomo filings. When DIY is fine, when it isn't, and how to cut your gestor's fee either way.

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2026-06-19

Autónomo social security and the tarifa plana in 2026: what you'll actually pay

How Spanish autónomo social security works in 2026: the 15-bracket income-based system, the €80/month tarifa plana for new autónomos, and how it fits alongside UK National Insurance for British freelancers.

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2026-06-18

Modelo 100: the 30 June deadline survival guide for expats (2026)

Spain's annual income tax return (Modelo 100, la Renta) is due 30 June 2026. What it is, who has to file, what you need ready, and how to avoid the last-minute panic if you're an expat.

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2026-06-17

The British Autónomo's Guide to UK + Spain Dual Tax (2026)

Living in Spain, earning from the UK? Here's exactly how UK + Spain dual tax works for British autónomos in 2026: residency, what you file where, and how to avoid paying twice. Plain English.

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