Part surrender vs segment surrender: same cash, different tax

Most investment bonds are written as a cluster of identical mini-policies — segments — commonly 100 or 1,000 of them. That structure gives every withdrawal two legal routes, taxed by entirely different rules. A part surrender takes the cash proportionately across all segments and is measured against the cumulative 5% allowance (IPTM3540). Draw more than the allowance and the excess is a chargeable gain, whatever the bond has actually done. A segment surrender fully surrenders a chosen number of whole segments — call it K — (IPTM7330): each is a final event on a separate policy, so the gain is that segment's share of actual growth, value minus premiums.

The same £30,000, both ways

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.

The bond is worth less than was paid in, so each segment's final-event gain is nil. The segment route raises the cash with no chargeable event gain at all. The part-surrender route manufactures a £15,000 gain before any TAR because it measures against the allowance, not the investment. Same client, same bond, same need — the £2,900 is purely the mechanism.

IPTM7330 (cluster policies) · IPTM3540 · IPTM3560 — figures engine-computed, 2026/27 config

Which route wins is case-specific

Segments don't always win. On a bond standing at a large gain, a segment surrender crystallises real growth now, whereas a withdrawal inside the unused 5% pool defers tax entirely — there the part surrender is the quiet route. What decides it is the bond's gain position, the unused allowance, the client's marginal band this year, and how many complete years have run, since more years means bigger slice relief. Neither route is better in the abstract. They differ, and the difference is knowable before the instruction is sent.

The common error: the default form

Provider withdrawal forms commonly default to a part surrender across all segments. A request phrased as “please send £30,000” gets processed that way; the excess is fixed at the end of the insurance year and the certificate follows within three months of that. The shape of the instruction makes the election, before payment, and a validly made surrender cannot be reversed afterwards (IPTM7330) — so the comparison has to happen at the point of request, in writing. The chargeable event gain calculator prices all three routes (full surrender, part surrender, K segments) on your figures, shows the tax due and effective rate for each, and marks a route “Least tax now” only where it has both the lowest rate and the least tax due.

Routes can also be combined — whole segments for part of the cash and a part surrender within the remaining 5% allowance for the rest — with each part taxed under its own rule.