If you are not entirely sure what year end accounts are, what they include, or when yours are actually due, you are not alone. This guide covers what year end accounts require, who needs to file them, what the deadlines and penalties look like, and what working with an accountant on them actually involves.

Why year end accounts matter for your business

Year end accounts are the official financial summary of your business for a given accounting period. For limited companies, they must be filed with Companies House and HMRC every year, even if the company has not traded or has made no profit. Sole traders and partnerships do not file accounts with Companies House, but their figures still form the basis of a Self Assessment tax return submitted to HMRC.

Getting this right is not optional. Errors in your accounts can lead to an incorrect tax bill, HMRC enquiries, or penalties for late filing. The figures in your year end accounts are also the ones banks, mortgage lenders, and investors will rely on if you ever need external finance.

Where most people go wrong with year end accounts

Most problems with year end accounts are not the result of deliberate errors. They come from confusion about deadlines, incomplete records, or simply leaving things too late. These are the two issues that cause the most avoidable stress and cost.

Missing the filing deadline

Limited companies have nine months from their accounting year end to file accounts with Companies House. Miss that deadline and the penalties start at £150 for up to one month late, rising to £375 for one to three months, £750 for three to six months, and £1,500 for anything beyond six months. Those figures are doubled if your accounts are late for two consecutive years. Knowing your exact year end date and working backwards from it is the single most important thing you can do.

Incomplete or inconsistent records

Year end accounts are only as accurate as the records behind them. Missing invoices, unreconciled bank statements, and unclaimed expenses all create problems when it comes to preparing the final figures. Sending an accountant a shoebox of receipts in month twelve costs far more in time and money than keeping reasonable records throughout the year.

What to do: a step-by-step overview

The process for preparing year end accounts follows a clear sequence. The timeline and exact requirements vary depending on whether you operate as a sole trader, partnership, or limited company, but the core steps are consistent.

1. Step 1 – Gather your financial records. Collect all bank statements, sales invoices, purchase receipts, payroll records, and any loan or asset documentation for the accounting period. The more organised these are, the faster and more accurately your accounts can be prepared.
2. Step 2 – Reconcile your accounts. Every transaction in your bank statement should match a record in your bookkeeping. Any gaps need to be identified and resolved before the accounts can be finalised. This includes checking VAT records if you are VAT registered.
3. Step 3 – File with Companies House and HMRC. For limited companies, the statutory accounts go to Companies House and a Corporation Tax return (CT600) goes to HMRC. Since 1 April 2026, both must be filed using HMRC-compatible commercial software. Sole traders submit their figures through a Self Assessment tax return instead.

An accountant handles all three stages on your behalf, including liaising with HMRC as your registered agent. If you are a limited company director doing this for the first time, the filing requirements can feel complex. Having someone who has done this hundreds of times removes that uncertainty.

Costs and what to expect

The cost of preparing year end accounts depends on the complexity of your business, the quality of your records, and whether you use an accountant or attempt to file yourself. For limited companies, DIY filing without accounting knowledge carries real risk. Even a small error in your Corporation Tax return can trigger an HMRC enquiry or result in an incorrect tax payment. At STZ Accounting, limited company packages start from £215 per month and include year end accounts, Corporation Tax filing, bookkeeping, and payroll. There are no surprise invoices at year end and no hourly rates.

How to get started today

If your year end is approaching and your records are not where they need to be, the practical first step is to work out exactly how much time you have. Your year end date is the last day of your accounting period. From that date, limited companies have nine months to file with Companies House. Book a free call and bring that date with you. David will tell you what is needed, what the timeline looks like, and what it costs.

• Find your accounting year end date. It will be on your original Companies House registration or your last filed accounts. Write it down and count forward nine months. That is your filing deadline.
• Gather whatever records you have, even if they are incomplete. Bank statements, invoices, and payroll records are the starting point. You do not need everything to be perfect before speaking to an accountant.