What is tax planning for a limited company, really? It’s one of those phrases that sounds complicated and slightly risky, but in most cases it just means making sure your company isn’t paying more tax than it needs to.

What tax planning actually means (and what it doesn’t)

Tax planning is the process of organising your company’s finances in a way that makes proper use of the reliefs, allowances and structures that already exist in UK tax law. It’s not a loophole. It’s not a grey area. It’s what every decent accountant should be doing for their clients as a matter of course.

The confusion comes because “tax planning” gets lumped in with tax avoidance schemes, which are a completely different thing. HMRC has been actively closing in on promoters of marketed avoidance schemes, with new measures including Universal Stop Notices and stronger investigation powers introduced in 2025. Straightforward tax planning for a small limited company sits nowhere near any of that.

The main areas where limited companies can plan their tax

The most common starting point is salary and dividend structure. As a director-shareholder, you have some control over how you extract money from your company. A low salary up to the National Insurance threshold, topped up with dividends, is a well-established and entirely legal approach. It’s not a secret trick — it’s the structure most owner-managed companies use, and HMRC is fully aware of it.

Pension contributions are another area that gets underused. Employer contributions paid directly from the company are a corporation tax deduction and don’t go through payroll, which means no National Insurance on either side. If you’re not paying anything into a pension through your company, you’re almost certainly paying more tax than you need to. Beyond that, there are areas like allowable expenses, the timing of large purchases, and R&D relief if your work qualifies — though that last one genuinely depends on what your company does.

What’s genuinely fine, what’s worth checking, and what to avoid

The no-brainer basics are things like making sure your company is claiming all allowable expenses, using the Annual Investment Allowance on equipment purchases, and getting the salary-dividend balance right for your personal circumstances. These don’t require complex planning — they just require someone to actually sit down and do the numbers with you. Most directors I speak to have never had that conversation properly.

Where it gets more careful is around things like paying a spouse or family member through the company, or directors’ loans. Both can be done correctly and legitimately, but both can also create serious problems if they’re handled badly. Directors’ loan accounts in particular are a common source of unexpected tax bills and can cause real difficulties if the company ever runs into financial trouble. The rule is straightforward: if it’s been done properly and documented properly, it’s fine. If it hasn’t, it isn’t.

When should you actually start thinking about this?

The honest answer is: before your year-end, not after. Tax planning done in the last few weeks of your financial year can still make a difference, but planning done throughout the year gives you far more options. Once the year is closed, a lot of decisions can’t be undone. I see this regularly with new clients who come to me after their previous accountant filed the accounts and told them what they owed — with no conversation beforehand about how to reduce it.

Corporation tax receipts continue to rise year on year, which tells you HMRC is collecting more, not less. That makes it more important, not less, to make sure your company is structured correctly. If your accountant only contacts you at year-end and never raises tax planning during the year, that’s worth thinking about.