New Company Director? The Tax Registrations That Don't Wait for 5 October


 

Congratulations on the new company. Now for the part nobody warned you about: becoming a director creates a personal tax life that is separate from the company, and most of its registrations run on HMRC deadlines that will not wait for you to feel settled.

The biggest misunderstanding is that registering your company does the job. It does not. Companies House and HMRC are different organisations, and your company's corporation tax registration does not register you, the individual director, for anything. Here is the practical checklist for your first 30 days.

1. Self Assessment Registration (Yes, You Personally)

If you have untaxed income, you must register for Self Assessment yourself. Directors very commonly do: dividends from your own company, rental income, freelance or consultancy side income, and foreign income all count. The rule is the same as for everyone else: if you had untaxed income in the 2025/26 tax year and had not registered before, your registration deadline was 5 October 2026.

Missed the 5 October deadline?

Register online now anyway. Your UTR normally arrives within about 72 hours these days, confirmed by email or text. HMRC will send you a letter or email giving you a different filing deadline, usually three months from that letter. The payment deadline does not move: 2025/26 tax is still due by 11:59pm on 31 January 2027. The late-registration penalty is a percentage of unpaid tax, not an automatic 100 pound fine (that is the late filing penalty), so registering now and paying on time is how you keep it at zero.

This is general information, not tax advice; if you are facing penalties, speak to a qualified accountant.

2. PAYE Registration as an Employer

If your company pays anyone, including you as a director, it must register as an employer with HMRC and operate PAYE. Many new directors run a small salary through PAYE, typically up to the National Insurance threshold, alongside dividends, because it is a tax-efficient and pension-friendly way to extract profits. The moment you pay that first salary, the company needs an employer PAYE reference, and payroll must be reported to HMRC on or before every payday through Real Time Information.

Running payroll is also where most new directors discover how many moving parts there are: PAYE codes, National Insurance for directors (which is calculated on an annual basis, unlike employees), auto-enrolment pensions, and end-of-year reporting. Handing this to specialists for payroll outsourcing is a common move for directors who would rather run the business than run payroll.

3. Corporation Tax Registration for the Company

Your company must register for corporation tax within three months of starting to trade, which is a separate deadline from your personal Self Assessment registration. This catches new directors out because the deadlines sit close together and have similar names. Put both dates in your calendar now: your personal Self Assessment filing date, and the company's corporation tax registration deadline.

4. Director's Loan Account: the Pitfall Nobody Mentions

The director's loan account records money moving between you and the company. Take money out that is not salary or dividends, and it becomes a loan you owe the company. Leave a loan over 10,000 pounds outstanding and it is a taxable benefit. Overdrawn loan accounts at year end can trigger a 33.75 percent charge under Section 455. The safe habit: never take money from the company without recording whether it is salary, a declared dividend, or a loan, and review the balance monthly.

5. National Insurance for Directors

Directors are employees for National Insurance purposes, but their contributions are assessed on an annual earnings period rather than per pay period. This is actually an advantage: a director paid irregularly across the year still gets a single annual calculation, which can smooth out the cost compared with employees. Get the calculation wrong, though, and the correction lands at year end with interest. Make sure whoever runs your payroll understands the annual basis rule.

Your First-30-Days Checklist

Register yourself for Self Assessment (or register late now if you missed 5 October); register the company as an employer if you will run PAYE, and set up Real Time Information reporting; register the company for corporation tax within three months of starting to trade; agree your salary versus dividend mix and record every personal withdrawal properly; check the director's loan account balance monthly; confirm your payroll provider handles directors' annual National Insurance correctly.

If you want the tax side handled alongside the payroll side, Finex Outsourcing supports UK businesses with outsourced finance functions. Their Self Assessment and corporation tax support is detailed on the corporation tax and self assessment page.

Becoming a director is exciting. The registrations above are the boring part, but getting them done in the first 30 days is what keeps the exciting part free of HMRC surprises later.

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