# Your First Financial Year-End: A New Company Checklist

> A new UK company's first financial year-end brings several obligations at once. Here is a plain-English checklist covering annual accounts, Companies House filings and Corporation Tax basics.

*Section: Personal Finance — By Marcus Vale (Editor-in-Chief & Business & Markets Editor) — Published April 5, 2026 — 5 min read*

Canonical URL: https://dailyjunction.co.uk/business-finance/first-financial-year-end
Tags: year-end, Companies House, Corporation Tax, company accounts, small business

## Key takeaways

- A UK company's accounting reference date sets when its financial year ends and the filing clock starts.
- Most companies must file annual accounts with Companies House and a Company Tax Return with HMRC.
- Corporation Tax is generally paid before the tax return is filed, which surprises many first-time directors.
- Good records all year, plus knowing your deadlines, make a first year-end far less stressful.

Setting up a UK limited company is the easy part. The first **financial year-end** is when the real administrative obligations arrive — often several at once, with deadlines that do not wait. Annual accounts, a tax return, a payment to HMRC and a filing or two at Companies House all land in the same window, and the order in which they fall surprises many first-time directors. This checklist explains, in plain English, what your first year-end involves and how to approach it calmly.

> This article is general information, not financial or legal advice. Company filing and tax rules are detailed and change over time. For your own company, check GOV.UK and Companies House guidance or speak to a qualified accountant.

## First, know your dates

Everything starts with your **accounting reference date** — the date your company's financial year ends. When you incorporate, Companies House normally sets this as the anniversary of the last day of the month in which the company was formed. So a company set up on 12 June would typically have an accounting reference date of 30 June.

One quirk catches people out: a company's *first* accounting period is often slightly longer than 12 months, because it runs from the date of incorporation to that first reference date. Your first set of accounts may therefore cover, say, 13 months rather than exactly a year.

Knowing your dates is half the battle. From the year-end, the filing and payment clocks start running, so the first job is simply to write down when your year ends and work backward from there. If you are still at the very start, our guide to [how to register a UK company](/business/how-to-register-a-uk-company) covers what is set up at incorporation and the responsibilities that come with being a director.

## The core obligations

Most small companies face three main things around year-end. They go to two different bodies — **Companies House** (the registrar of companies) and **HMRC** (the tax authority) — which is part of why it feels like a lot at once.

| Obligation | Filed with | Broad purpose |
|------------|-----------|----------------|
| Annual accounts | Companies House | Report the company's financial position |
| Company Tax Return (CT600) | HMRC | Calculate Corporation Tax owed |
| Corporation Tax payment | HMRC | Pay the tax due |
| Confirmation statement | Companies House | Confirm company details (own annual cycle) |

### 1. Annual accounts

Your company must prepare **annual accounts** (sometimes called statutory accounts) from its financial records, and file them with Companies House. Smaller companies can usually file simpler "small" or "micro-entity" accounts rather than the full set, but they must still meet recognised accounting standards. The accounts give a true and fair picture of the company's finances over the period.

### 2. The Company Tax Return

Separately, you must send a **Company Tax Return (form CT600)** to HMRC. This works out how much **Corporation Tax** the company owes on its profits. The accounts and the tax return draw on the same underlying figures but are distinct filings going to distinct organisations — a point worth internalising early.

### 3. Paying Corporation Tax

Here is the ordering that trips up first-time directors. For most small companies, **Corporation Tax is generally due nine months and one day after the end of the accounting period — which is usually *before* the deadline to file the tax return.** In other words, you often have to *pay* the tax before the return that calculates it is formally due.

The practical lesson: do not wait until the filing deadline to think about the bill. Estimate and set aside the money well in advance, so the payment date does not arrive as a nasty surprise. Setting up a [dedicated business bank account](/business-finance/how-to-choose-a-business-bank-account) from day one makes this far easier, because tax money can be kept clearly separate from working cash.

## The confirmation statement

Slightly apart from the year-end accounts cycle, every company must also file a **confirmation statement** with Companies House at least once a year. This simply confirms that the registered details — directors, registered office, shareholders and so on — are up to date. It runs on its own annual schedule rather than tracking your accounting date, but it is part of the same family of yearly obligations, so it is worth diarising alongside everything else.

## A practical year-end checklist

Pulling it together, here is a sensible sequence for a first year-end:

1. **Confirm your accounting reference date** and note the resulting deadlines for accounts, the tax return and the Corporation Tax payment.
2. **Get your records in order.** Reconcile your bank account, gather invoices and receipts, and make sure income and expenses are complete and accurate.
3. **Prepare the annual accounts** to the appropriate standard for your company size.
4. **Prepare and check the Company Tax Return**, calculating Corporation Tax on your profits.
5. **Set aside and pay the Corporation Tax** by its deadline — remembering it usually falls before the return deadline.
6. **File the accounts with Companies House and the return with HMRC** by their respective dates.
7. **File your confirmation statement** when its own deadline comes around.

The single biggest stress-reducer is good record-keeping *throughout* the year, not a frantic scramble at the end. For a broader, ongoing view, our [end-of-financial-year checklist](/business-finance/end-of-financial-year-checklist) is a useful companion, and if you are also approaching the VAT threshold it is worth understanding [UK VAT registration](/business-finance/uk-vat-registration) and the move toward digital tax reporting.

## Getting help

Using an accountant is not legally required, but many directors do, especially for a first year-end, because accounts and returns must meet specific standards and deadlines and the rules can be intricate. Whether you do it yourself or get help, the authoritative sources for current requirements are GOV.UK and Companies House. Some firms also publish practical primers for new company owners — London consultancy CM Beyer, for example, offers a walkthrough on [preparing for your first financial year-end](https://cmbeyer.co.uk/preparing-for-your-first-financial-year-end-as-a-new-company/) — though such guides are general orientation rather than advice for your specific situation.

## The bottom line

Your first financial year-end brings several obligations together: preparing and filing annual accounts with Companies House, sending a Company Tax Return to HMRC, paying Corporation Tax — usually before the return is even due — and keeping your confirmation statement up to date. None of it is especially hard once you know the dates and keep clean records all year, but the deadlines are firm and the ordering is unintuitive. Map your accounting reference date, work backward to your deadlines, set tax money aside early, and lean on GOV.UK, Companies House or a qualified accountant for the specifics. Treated as a planned routine rather than a year-end panic, your first year-end becomes a manageable process, not a crisis.

## Frequently asked questions

### When is a UK company's first financial year-end?

It is set by the accounting reference date, which Companies House usually sets as the anniversary of the last day of the month in which the company was incorporated. A company's first accounts often cover a slightly longer period than 12 months as a result.

### What does a new company have to file at year-end?

Generally, annual accounts must be filed with Companies House, and a Company Tax Return (CT600) with HMRC, along with paying any Corporation Tax due. A confirmation statement is also filed with Companies House, though on its own annual cycle. Exact requirements depend on the company.

### When is Corporation Tax due?

For most small companies, Corporation Tax is generally due nine months and one day after the end of the accounting period — which is usually before the deadline to file the Company Tax Return. This ordering catches many first-time directors out, so it is worth planning for early.

### Do I need an accountant for my first year-end?

It is not legally required, but many directors use one. Company accounts and tax returns must meet specific standards and deadlines, and the rules can be intricate. This article is general information, not financial or legal advice — check GOV.UK or a qualified accountant for your situation.

## Sources

- [GOV.UK](https://www.gov.uk/)
- [Companies House](https://www.gov.uk/government/organisations/companies-house)

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