Investment bonds · Top-slicing relief
Does top-slicing relief reduce adjusted net income?
Skip to calculators for this topicThe relief lowers the tax bill, not the income figure. So the full bond gain still abates the personal allowance and still counts for the child benefit charge.
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— In short
No. Top-slicing relief reduces the tax on a chargeable event gain, not the gain itself, so the full gain stays in the member's adjusted net income. Because of that, the whole gain still abates the personal allowance once adjusted net income passes £100,000 and still counts for the High Income Child Benefit Charge. It is a tax reducer, applied near the end of the calculation, not a deduction from income.
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No. Top-slicing relief reduces the tax on a chargeable event gain; it does not reduce the gain. The full gain stays in the member's adjusted net income (ANI) — so it still abates the personal allowance over £100,000, and still counts for the High Income Child Benefit Charge. The relief is a tax reducer, not an income deduction.
A reducer, not a deduction
Top-slicing relief is given under ITTOIA 2005 s.535 as a reduction of the individual's income tax liability, applied near the end of the income tax calculation. It is not a deduction taken off income at the start. Adjusted net income (ITA 2007 s.58) is built from total income — and the whole chargeable event gain is part of total income. Nothing in the relief takes it back out.
- Chargeable gain (before any TAR)
- £60,000
- In adjusted net income
- the full £60,000 (not the £10,000 slice)
- Personal-allowance taper (ANI > £100,000)
- tested on ANI including the full gain (here ANI is £95,000, so no taper)
- Top-slicing relief
- reduces the tax on the gain only
Worked-example basis: No time-apportioned reduction is due for any gain or policy shown. TAR is not calculated or applied. Raw gains are shown before any TAR.
One feature of the relief causes most of the confusion. Inside the five-step computation, at Step 4, the personal allowance is recomputed at a lower notional income that uses only the annual-equivalent slice. That recomputed PA can exceed the member's real-income PA — but it lives entirely within the relief calculation. It is not a restoration of the real personal allowance, and it does not feed back into ANI. The member's actual PA, computed on actual ANI including the full gain, stays abated.
Two things hold at once without conflict. The personal allowance is abated on the real income (full gain in ANI), and the relief recomputes a notional PA at the slice level to work out the relief. The full five-step working — both the real and the notional figures — is shown on the top-slicing relief calculator. For why that Step-4 recompute exists (FA 2020 s.37, effective 11 March 2020 and applied by HMRC to gains from 2018/19; the savings allowances followed for gains from 2021/22), see the IPTM3820 explainer, and for the steps themselves, how to calculate top-slicing relief.
ITTOIA 2005 s.535 (relief as a tax reducer) · ITA 2007 s.58 (adjusted net income) · IPTM3820 (the Step-4 notional recompute)
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Common questions
- Does top-slicing relief reduce adjusted net income?
- No. Top-slicing relief reduces the income tax on a bond gain, not the gain itself. The full chargeable event gain stays in adjusted net income (ITA 2007 s.58), so it still affects the personal-allowance taper and the High Income Child Benefit Charge.
- Does a bond gain reduce my personal allowance?
- It can. The full chargeable event gain counts in adjusted net income, so if that pushes you over £100,000 your personal allowance is tapered. Top-slicing relief lowers the tax on the gain but does not restore the abated personal allowance on your actual income.
- Why does the calculator show a different personal allowance inside the relief?
- Step 4 of top-slicing relief uses a notional income with only one year’s slice of the gain, and recomputes the personal allowance at that lower level. That recomputed allowance is internal to the relief — it isn’t a restoration of your real-income personal allowance.
- Does the slice, rather than the full gain, count for the child benefit charge?
- No. For adjusted-net-income tests such as the High Income Child Benefit Charge, the full gain counts, not the annual-equivalent slice. The slice is only used inside the top-slicing relief computation.
Sources
Based on ITTOIA 2005 s.535 (the relief as a tax reducer) and ITA 2007 s.58 (adjusted net income).
For planning and illustration purposes only. Verify all inputs against source documents. This explainer does not constitute financial or tax advice.