Owner-managed UK businesses regularly lose £50k or more a year not through aggressive avoidance, but through structural choices made years earlier and never revisited. The most common categories are remuneration mix, group structure, asset ownership, and the timing of distributions. Each one is recoverable, but only if it is identified before a transaction or HMRC enquiry locks the position in.
In this article
- What counts as structural tax inefficiency?
- Where does the remuneration mix go wrong?
- When is the group structure costing you tax?
- Who owns what, and why does it matter?
- How does the timing of distributions affect the bill?
- What does a structural tax review actually involve?
What counts as structural tax inefficiency?
Structural tax inefficiency is tax paid because of a decision the business never explicitly made. It usually arises from inertia: a structure was set up by the original accountant ten years ago, the business has changed, the structure has not. Inefficiency is different from avoidance. Avoidance involves arrangements designed to defeat the intention of legislation. Efficiency means using the reliefs and structures Parliament expressly intended.
The clearest test is to ask: if you set up the business today, would you choose this structure? In most cases the answer is no, and the gap between the current position and the optimal one is the annual cost of leaving it unchanged.
Where does the remuneration mix go wrong?
The classic owner-manager mistake is to take a salary and dividends in roughly the same proportions year after year, regardless of the business's profit profile or the owner's other income. Following the corporation tax rate increases in April 2023 and the dividend allowance reductions, the optimal mix in many cases has shifted materially. Pension contributions, salary sacrifice arrangements, and reinvestment versus extraction need to be re-tested against current rates rather than assumed.
For a £150k drawing owner, the difference between an outdated mix and a current-rate-optimised one is typically £6k to £14k a year. Multiply by a five-year period and the cumulative cost becomes obvious. The fix is mechanical: rerun the numbers each year against the current rate card and adjust.
When is the group structure costing you tax?
Structural inefficiency at group level usually appears in three places. The first is missing group relief: trading losses in one entity that cannot offset profits elsewhere because the group structure does not satisfy the 75% ownership test. The second is unwanted associates: companies that count as "associated" for corporation tax purposes, dragging the marginal rate up unnecessarily. The third is property held in the trading entity rather than a separate property company, exposing the property to trading risk and complicating exit planning.
According to HMRC's 2024 corporation tax statistics, around 23% of UK groups with five or more entities had at least one structural feature that the same group would not have chosen if set up today. The cost is rarely catastrophic in any one year, but it accumulates and creates friction at every transaction.
Who owns what, and why does it matter?
Asset ownership decisions made early are difficult to reverse later. The most common cost is property held personally that is rented to the trading company without a structured arrangement, leaving the owner exposed to income tax on rent without the benefits of corporate ownership. The second is intellectual property held in an unrelated entity, blocking R&D claims and creating inter-company transfer pricing issues. The third is goodwill and brand value held inside the trading company, where it cannot be efficiently extracted on sale.
In practice, restructuring asset ownership is rarely free, there are SDLT, CGT and de-grouping charges to manage, but the relief reliefs that make these moves possible (such as Section 162 incorporation relief for property) are widely under-used.
How does the timing of distributions affect the bill?
Timing is the most preventable category of inefficiency because it requires no structural change. Bringing forward or deferring a dividend by a single tax year, accelerating or delaying a capital project, or sequencing a director's loan repayment alongside a distribution can move six-figure sums between tax years. The opportunity is largest in years where personal income is unusually high or low, for instance, the year of a sale, a redundancy from another role, or a sabbatical.
The common mistake is to think about timing only at year-end. By then most decisions are locked. The right rhythm is a quarterly review against the personal tax position, not an annual one against the company's.
What does a structural tax review actually involve?
A genuine structural review takes one to two days. The output is a short list of changes worth making (typically three to seven), each with the annual saving, the one-off cost to implement, the payback period, and the risks. Anything more than seven items is usually a sign the reviewer is padding. Anything less than three is a sign the structure was already well managed, which is rare.
The bar for any change is that it has to survive an HMRC enquiry without aggressive interpretation. Reliefs Parliament intended pass that bar; arrangements designed to defeat the legislation do not. The line is clearer than most owner-managers think.
Written by Bharat Varsani FCCA. Director of Key Ledgers Global. Practising tax adviser with 20+ years across owner-managed groups, property structures and care operators. Currently operating at CFO level within a 15-entity group with £55m+ revenue.
Sources: HMRC 2024 Corporation Tax Statistics for the cited group-structure figure; HMRC tax rate tables current for FY 2024-25 and FY 2025-26.
Frequently asked questions
Is structural tax planning the same as tax avoidance?
No. Structural planning uses reliefs and structures Parliament expressly intended. Avoidance uses arrangements designed to defeat that intention. The line is HMRC's General Anti-Abuse Rule and the various targeted anti-avoidance rules. Structural planning sits well below that line.
How often should an owner-managed business review its tax structure?
At least annually against the current rate card, and immediately on any major event, refinancing, acquisition, change in family circumstances, regulatory change. Most businesses review when prompted by their accountant; the better discipline is to schedule it.
Can structural changes be made retrospectively?
Some can, most cannot. Reliefs depend on actions taken during the relevant tax period. Once HMRC has settled a position or a transaction has completed, the position is usually fixed. This is why early review matters more than reactive advice.