Working in retirement, and what it does to the plan

A large and growing share of people work in some form after leaving their main career. The financial effects are more complicated than simply having more income.

The earnings test

The provision that causes the most confusion.

Someone claiming Social Security before full retirement age while continuing to earn is subject to a test that withholds benefits above a defined earnings threshold.

The thresholds are adjusted annually, and a more generous threshold applies in the year full retirement age is reached.

The critical point that is widely misunderstood: withheld benefits are not lost. At full retirement age, the benefit is recalculated to account for months in which benefits were withheld, which increases the ongoing amount.

So the earnings test is a deferral rather than a forfeiture, though the cash flow effect during the working years is real.

After full retirement age there is no earnings test at all.

The benefit recalculation

A second and more favourable effect.

Social Security benefits are based on the highest thirty-five years of indexed earnings. Additional earnings after claiming are still counted, and if a year of work exceeds one of the years in the existing record, the benefit is recalculated upward.

This matters most for those with gaps or low-earning years in their record, where even modest late-career earnings can replace a zero.

Tax effects

Earned income in retirement interacts with several thresholds.

It can increase the proportion of Social Security benefits subject to tax.

It can push income over the levels that trigger Medicare premium surcharges, with a two-year lag.

It can push capital gains from the zero per cent rate into a taxed bracket.

And it reduces the room available for Roth conversions during what would otherwise be low-income years.

None of these argue against working. They argue for modelling the effect rather than assuming that additional income is straightforwardly additive.

What it enables

The advantages are substantial and are frequently understated.

Delayed withdrawals. Income that covers living costs means the portfolio is not drawn on, which is most valuable in the early retirement years when sequence risk is highest.

Continued contributions. Earned income permits IRA contributions, and some employers offer retirement plans to part-time staff.

Health coverage, where the role provides it, which can be worth more than the salary for someone under Medicare age.

Delayed claiming. Work income during the sixties makes delaying Social Security to seventy feasible, which permanently increases the benefit.

The non-financial part

Worth noting, since it frequently determines the decision.

Research on retirement and wellbeing produces mixed results, with outcomes depending heavily on whether the retirement was voluntary, on health, and on whether social contact and structure are maintained.

Continued work supplies structure, purpose and social contact, which are among the things people most commonly report missing.

Phased approaches — reduced hours, consulting, seasonal work — appear in many accounts as more satisfactory than an abrupt stop, and are increasingly available.

Self-employment

Common in this stage and it carries specific considerations.

Self-employment income is subject to self-employment tax, which covers both halves of the payroll tax contribution.

It also opens access to retirement plans with substantially higher contribution limits than an IRA — solo plans and simplified employee pensions among them.

For someone with meaningful self-employment income in their sixties, these can allow significant additional tax-advantaged saving.

The realistic caution

Plans that depend on working into the late sixties should be stress-tested against the possibility that it does not happen.

Surveys consistently find that a substantial proportion of retirees left work earlier than they had planned, most commonly due to health problems, caring responsibilities or job loss.

Which means working longer is a good plan and a poor sole plan, and the difference is whether there is a fallback.

The employment options that fit

Worth listing, since the assumption is frequently that the choice is full-time or nothing.

Consulting in a former field, which generally pays best relative to hours.

Part-time or seasonal work, which suits people wanting structure without commitment.

Contract or project work.

Working for a former employer on reduced hours, which many organisations will accommodate if asked and rarely offer unprompted.

That last route is the most commonly overlooked, and the conversation is worth having before rather than after leaving.

General information only, not financial or tax advice. Thresholds change annually — consult a qualified adviser about your own situation.