Self-Assessment runs on a handful of fixed dates - and HMRC's penalties for missing them are automatic, steep, and land even if you don't owe a penny. This guide sets out every deadline that matters, exactly what late filing and late payment cost you, and - if you've already slipped past a date - how to limit the damage. It's part of our series of simple explainers and sits alongside our Essential Guide to Self-Assessment for the Self-Employed, which covers who actually needs

July can often bring confusion and surprise for UK taxpayers dealing with payments on account. Following on from our recent blog post on Making Tax Digital for Income Tax Self-Assessment and what that will mean for you as a Self Assessment tax payer, this next guide in our series we'll clearly explain what payments on account are, who needs to make these payments, how they're calculated, and provide straightforward worked examples to make it simple to understand. Read on to f