A partner's income stops when a pension does

Income arrangements set up for one person may not continue for another. What happens on death is chosen when the arrangement is established, often years before it matters.

Single life and joint arrangements differ

An income arranged on one life ends when that person dies. An arrangement covering two continues, usually at a reduced level, until the second death.

The two-life version pays less from the outset, because payments are expected to continue for longer. The difference is the cost of the continuation.

That trade is made once and cannot generally be revisited. Choosing the higher starting payment means choosing that payments stop at the first death.

Household costs do not halve

The shortfall is larger than it appears because many costs are fixed to the property rather than to the number of occupants. Housing, utilities and insurance change little.

A household losing a substantial share of its income while retaining most of its costs faces a squeeze rather than a proportional adjustment.

The gap is therefore not the lost income minus one person's spending. It is the lost income minus the small share of costs that genuinely fall away.

Guarantee periods are a partial answer

Some arrangements continue payments for a minimum number of years regardless of death, which protects against dying shortly after the income begins.

That protection is time-limited by construction. It addresses an early death and provides nothing to a partner surviving beyond the guaranteed period.

It is cheaper than a full two-life arrangement for exactly that reason, and the two are frequently compared as though they addressed the same risk.

Workplace pensions have their own rules

Pensions paying a defined income often provide a reduced continuation to a surviving spouse or partner, with the proportion set by the scheme rather than chosen.

Eligibility conditions vary and can depend on marital status, on when a relationship began, or on notification requirements that must be met in advance.

These rules differ by scheme and by jurisdiction and change over time, so the position is whatever the scheme's current documentation states.

The gap is calculable in advance

Working out what each person's income would be after the other's death is arithmetic that can be done now, using figures the providers already supply.

Doing it reveals whether a gap exists while there is still time to address it, whether through the arrangement itself or through other resources.

The calculation is uncomfortable and short. It is also the only way the question gets answered before the circumstances arrive that make it unanswerable.