Easy, affordable and 100% online. Learn more
Wondering what exactly a Corporation Tax Self Assessment (CTSA) is? Don’t worry, we’re here to make it easy for you!
We’re going to break down Self Assessment, company tax returns, and everything you need to keep your business on the right side of HMRC.
So, let’s dive in!
A Self Assessment is how you tell HMRC about your untaxed income. It’s your responsibility to spill the beans on all your earnings and expenses so you can pay the right amount of tax on your profits.
Here’s what a Corporation Tax Self Assessment usually includes:
Getting your company tax return right is important. It ensures you pay the correct amount of corporation tax and helps you steer clear of potential penalties from HMRC.
The main tax limited companies should be aware of is corporation tax, which is based on your business’s annual profits. The rate you’ll pay depends on how much profit you make.
Corporation tax is due 9 months and 1 day after your accounting period ends. Here’s an example if your financial year ended on 31 May 2024.
In addition to corporation tax, your limited company may also need to pay:
You can pay your corporation tax bill online, in full or in instalments, through your HMRC tax account.
If you’re a company director and you need to file a personal tax return, you’ll need to register for Self Assessment. This can be done online through the HMRC website or by completing a paper form. For more information, click here.
To file updates like your annual company tax return, you or your accountant will need your Companies House authentication code. If you’ve forgotten it or need a reminder, don’t worry, here’s how to get a new one:
1. Log in to Companies House – head to the Companies House website and sign in via their web filing service. If you don’t have an account already, you can create one here.
2. Find the authentication code section – once you’re logged in, find the section for managing your authentication code. This will be under your account settings or company security.
3. Request a new code – follow the on-screen instructions to request a new authentication code.
4. Wait for your code – Companies House will send your code to your registered address or email. It should arrive within a few days. If you already have one, they’ll send you a reminder.
If your payment is late or not enough, HMRC will add interest to what you owe.
HMRC’s late payment rates are linked to the Bank of England. So, you’ll pay a set base rate plus 2.5%. If your bill is already late, pay it sooner rather than later to avoid extra penalties.
And if you’re having trouble paying, don’t worry – reach out to HMRC directly. They might be able to set up a payment plan to help. You can call them on 0300-200-3822.
Unsure about your corporation tax? No worries, we’ve got you covered! We can match you with a qualified accountant who will review your tax situation and provide expert advice to help you navigate your liability. Contact us today
Sign up for important updates, deadline reminders and basic tax hacks sent straight to your inbox.
"*" indicates required fields
Or see our Guides, Calculators or Taxopedia