Paying my self-assessment bill; should I leave it as late as possible?

Hello, just a quick question regarding payment of my self-assessment bill. Let's say for example, my bill is £20,000 for the tax year 22-23, which if I am correct, is due in January 2024. Is there any reason NOT to just leave this money in a savings account (earning interest) until January? I ask because I would usually pay things as soon as possible, but I guess if I can earn 5% interest on it in my savings, I might as well, right? Or am I missing something?

Hi
We only ask that you pay the amount due by the due date.
Thankyou.