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Missing an HMRC Self Assessment deadline results in automatic penalties — even if you don't owe any tax. This guide covers every key tax deadline for 2025/26, including the 31st January filing deadline, payment on account dates, and how Accounted4Tax ensures you never pay an unnecessary fine.

Started working for yourself? You must register as self-employed with HMRC and get a UTR number before you can file your first Self Assessment tax return. This step-by-step guide explains exactly how to register, what deadlines to meet, and how Accounted4Tax can handle everything for you.

Most CIS construction workers are overtaxed at source by their contractors — and are owed a significant rebate from HMRC. Our average CIS client gets £2,500 back. This guide explains how CIS tax works, what expenses you can claim, and how Accounted4Tax gets you the maximum refund.