TaxCalc Blog

Self Assessment myths debunked: what’s true and what isn’t in 2025

If you’re completing your Self Assessment tax return yourself, it can be difficult to know what’s accurate and what’s just hearsay. Friends, social media, forums and even “well-meaning” advice can easily lead to confusion and, in some cases, unintentional mistakes.

Your Self Assessment Survival Guide: 12 common mistakes to avoid in 2025

Completing your own Self Assessment tax return is absolutely doable but, without the help of an accountant, it’s easy to fall into traps that could cost you time, money or even trigger unwanted attention from HMRC.

Whether you’re a freelancer, landlord, side hustler or someone with additional income or gains outside of PAYE, here are 12 of the most common mistakes people make when filing their Self Assessment tax return and how you can avoid them in 2025.

ISO 27001: Raising the bar for customer confidence

TaxCalc has achieved ISO 27001 certification in recent months, marking a major technical  milestone.

But it represents so much more than that; it’s a public commitment to safeguarding customer data and providing peace of mind. 

The 10 essentials to complete your Self-Assessment tax return for 2024/25

ESSENTIAL INFORMATION YOU’LL NEED TO COMPLETE YOUR SELF ASSESSMENT TAX RETURN

Completing a Self Assessment tax return is much easier when you have all the right information to hand before you start. Whether you’re employed, self-employed, a landlord, investor or someone with multiple income sources, gathering your documentation early can help you avoid mistakes, reduce last-minute stress and ensure you don’t miss anything important.

Budget 2025 - reaction and analysis

Chancellor Rachel Reeves delivered her second Budget on Wednesday 26 November 2025, introducing £26.1 billion in annual tax rises by 2029/30. While Labour's manifesto pledge not to increase income tax, National Insurance or VAT for "working people" remained technically intact, a raft of measures will significantly impact your clients' tax planning strategies. Here's the comprehensive update for accountants and their practices.

What you missed: The Fusion Report

Fusion 25, The first TaxCalc/Engager joint event was more than a conference, it was also a celebration.  

TaxCalc customers awarded for excellence

The Accounting Excellence Awards recognises the brightest and best of the profession every year.

At TaxCalc, we were delighted to see many of the accolades going to our customers when the ceremony took place on Tuesday night in London.

The roll call of winning TaxCalc customers is as follows...

Top 10 charity accounting mistakes – and how to avoid them

Charity accounting is complex. Many charities - particularly smaller ones - still get the basics wrong.

Between evolving regulations, unique governance structures and the quirks of SORP, even experienced accountancy professionals can stumble.

At TaxCalc, we’ve reviewed hundreds of charity accounts and seen the same mistakes crop up time and again.

Many of these issues stem from charities preparing accounts manually in Word or Excel, where errors are easy to make and hard to catch. Here’s a rundown of the most common pitfalls - and how you can avoid them.