A company year end is not just a date for filing accounts. It is the point at which a year of trading is turned into a clear record of profit, tax, cash movements and decisions made by the directors. Getting it right means fewer last-minute surprises, more time to plan, and a much stronger basis for the year ahead.
This company year end tax guide is designed for UK limited company directors who want to understand what needs doing, when it needs doing, and where professional advice can make a meaningful difference.
Start with the dates that apply to your company
Your company’s accounting reference date determines the end of its financial year. For many businesses, this will be the anniversary of the last day of the month in which the company was incorporated, although it can be changed in some circumstances.
That year end drives several separate deadlines. They are easy to confuse because they relate to the same set of accounts, but they are not the same thing. For a typical private limited company, statutory accounts must usually be filed with Companies House within nine months of the year end. The Corporation Tax payment is normally due nine months and one day after the accounting period ends. The Company Tax Return, including the CT600 and supporting accounts, is generally due within 12 months of the accounting period end.
A company’s Corporation Tax accounting period cannot normally be longer than 12 months, even where its first accounts cover a longer period. New companies can therefore have more than one Corporation Tax return to prepare for their first set of accounts.
Missing a deadline can mean penalties, interest and unnecessary correspondence from HMRC or Companies House. More importantly, it can put directors under pressure at a time when they should be focusing on customers and growth. Put every deadline in the diary well in advance, but aim to complete the work before the filing date rather than treating it as a target.
The company year end tax guide: what to prepare
Good year-end accounts begin with complete, orderly records. Your accountant can make adjustments and ask the right questions, but missing paperwork or unexplained transactions will slow the process down.
Before your accounts are prepared, reconcile your business bank accounts, credit cards, payment platforms and loans to the relevant statements. Make sure sales invoices have been raised for work completed, and identify any bills or expenses relating to the year that have not yet been recorded. This matters because accounts are usually prepared on an accruals basis: income and costs are recognised in the period they relate to, rather than simply when cash arrives or leaves the bank.
You should also gather records for major purchases, finance agreements, lease or hire arrangements, stock, director transactions and money owed to or by the company. If you use cloud accounting software, keeping bank feeds and invoice records up to date throughout the year makes this far less daunting.
Check director and shareholder transactions carefully
Transactions involving directors deserve particular attention. A director’s loan account tracks money taken from the company that is not salary, dividends or repayment of money previously owed to the director. It can also record expenses personally paid on the company’s behalf.
An overdrawn director’s loan account may have tax consequences, especially if it remains outstanding after the relevant deadline. It may also need to be disclosed in the accounts. Simply transferring money between personal and business accounts without a clear explanation is one of the most common causes of year-end delays.
Dividends need equal care. They can only be paid from available distributable profits, supported by appropriate records and board minutes. A healthy bank balance does not automatically mean there are profits available to distribute. If dividends have been taken during the year, provide the dividend vouchers and confirm the dates and amounts.
Plan tax before the year closes where possible
Once the year has ended, many planning opportunities have passed. This is why a review a few months before the accounting reference date is often more valuable than a rushed discussion after it.
The right approach depends on the company’s profits, cash position, growth plans and the director’s personal circumstances. A business expecting a higher-profit year may consider whether planned expenditure should be brought forward, provided it is genuinely needed and commercially sensible. Buying equipment solely for a tax deduction is rarely a good decision if it strains working capital or sits unused.
Capital allowances may be available on qualifying plant and machinery, with the Annual Investment Allowance offering relief for many purchases. The treatment of cars, integral features and leased assets can differ, so it is worth checking before committing to a significant purchase.
Employer pension contributions can also be an effective way to support a director’s longer-term plans while reducing taxable profits, where the contribution is wholly and exclusively for the purposes of the trade. However, pension allowances and personal tax considerations still apply. The timing of a contribution matters, as does ensuring the company can comfortably afford it.
For owner-managed businesses, the balance between salary, dividends and retained profit should be reviewed rather than repeated automatically each year. Tax rates, thresholds and family circumstances can change. A decision that worked well last year may not be the best option now.
Do not overlook payroll, VAT and personal tax
Year-end accounts are part of a wider compliance picture. If the company has employees or directors on payroll, check that pay records, benefits, pension contributions and PAYE submissions are complete. Errors in payroll can affect the accounts, Corporation Tax calculation and the individual’s personal tax position.
VAT returns should agree broadly with the sales and purchase records in the accounts, allowing for timing differences and different VAT schemes. If something does not reconcile, investigate it early. It could be a simple coding issue, but it could also indicate missing income, incorrectly claimed VAT or a transaction that needs specialist treatment.
Company directors may also have a Self Assessment obligation, particularly where they receive dividends, have untaxed income or need to report capital gains. The company’s year end and a director’s personal tax year are different, so records should be kept in a way that makes both straightforward. A company accountant who understands the director’s personal circumstances can help prevent one side of the picture being considered in isolation.
Review the draft accounts, not just the tax bill
When your draft accounts are ready, take time to understand them. The headline profit figure is useful, but it is not the only number that matters. Look at gross margin, overheads, money owed by customers, supplier balances, stock levels and the cash held by the business.
Ask why profits have moved compared with the previous year. Rising turnover is encouraging, but it can conceal pressure on margins or slow-paying customers. Equally, a lower profit may be perfectly understandable if the company has invested in people, equipment or a new service line.
The balance sheet is particularly valuable for directors. It shows whether the company has enough resources to meet its obligations and whether money is tied up in receivables, stock or director loans. This is where year-end accounts become more than a compliance exercise: they become a practical management tool.
Common year-end problems and how to avoid them
The most avoidable problems tend to be administrative rather than technical. Receipts are lost, private spending is put through the company bank account, invoices are raised late, and directors wait until the filing deadline to share records. These issues can usually be prevented with a regular monthly bookkeeping routine and a clear separation between business and personal finances.
It is also sensible to retain supporting documents for the required period and to keep notes of unusual transactions. For example, if the company has received a grant, sold an asset, made a large repair, written off a debt or started trading overseas, flag it to your accountant rather than assuming it will be obvious from the bank statement.
Businesses with more complex arrangements may need additional attention. This can include research and development activity, property income, international transactions, construction industry scheme deductions, group companies or loans from participators. Early advice is particularly useful in these cases, because the correct treatment can affect both tax and reporting requirements.
Make the next year easier
The best time to improve your year-end process is just after completing one. Set a monthly routine for reconciling accounts, photographing or uploading receipts, reviewing unpaid invoices and checking payroll and VAT records. A short monthly review is usually far easier than rebuilding a full year of information later.
At Coombs Chartered Accountants, we help directors turn year-end compliance into clear, practical insight. The aim is not simply to submit the right forms, but to give you confidence in the numbers behind your business and the decisions you make next.
A well-managed year end gives you a useful pause: a chance to confirm that the company is meeting its obligations, recognise what has gone well, and make the next financial decision with better information.
