Guide · Social Security
How to fund the years between retiring and claiming
Delaying to 70 raises your benefit — but only if something covers your spending in the meantime. The "bridge years" between retirement and claiming are usually funded from your own accounts, and they carry their own tax and Medicare consequences that are easy to miss.
Delaying isn't free, it's financed
Every year you delay claiming, you need income from somewhere else — savings, a taxable brokerage account, or an IRA withdrawal. That withdrawal is real spending against real assets, not a rounding error: eight bridge years at $60,000/year is $480,000 of spending that has to come from your own portfolio before Social Security ever contributes a dollar. If the household can't actually fund that gap, delaying isn't a viable plan no matter how good the math looks on paper.
Bridge income has its own tax footprint
An IRA withdrawal used to bridge the gap is taxable ordinary income, and it can push you into a higher bracket than you'd expect in a "no earned income" retirement year. It can also raise the MAGI that determines your Medicare Part B and D premiums two years later — a household that hasn't thought about IRMAA can be surprised by a surcharge that lands well after they've stopped thinking about the year that caused it. If you're bridging before age 65, the same income can affect an ACA marketplace subsidy, potentially crossing the 400%-of-poverty-line cliff.
The gate, not a penalty term
A household that genuinely cannot fund the bridge years has a constrained decision, full stop — no amount of longevity math changes that. The right way to model this is as a hard-or-soft gate that can override the unconstrained "delay is best" answer, not as a soft penalty folded into a blended score where it might get outweighed by other factors. When the gate binds, the honest answer is the best age the household can actually afford, clearly labeled as constrained rather than optimal.
A worked example
A household retiring at 62 planning to delay Social Security to 70 needs to bridge eight years. At $70,000/year in spending, that's $560,000 drawn from savings and IRA withdrawals before any Social Security check arrives — plus the tax on those withdrawals, plus any IRMAA or ACA effect they trigger. A household with a $1.2M portfolio might fund this comfortably; a household with $400,000 might not, in which case claiming earlier — even though it "loses" the delayed-credit math — may be the only plan that survives.
How Harbor handles it
Harbor draws your actual accounts, in the order you specify, to fund the bridge years, and runs the full tax and Medicare consequences of that income through the same projection used for the rest of the plan — so the bracket, the IRMAA tier, and any ACA effect for each bridge year are all visible, not assumed away. If the withdrawals required to bridge to a later claiming age would leave spending unfunded, Harbor reports the plan as constrained and names the latest claiming age it can actually support, rather than recommending a delay the household's own accounts can't carry.
Confirm your bridge years actually work
Harbor draws your real accounts and shows the bracket each bridge year lands in — not just whether delaying is theoretically better.
Start planning — it's free →Common questions
How do I fund the years between retiring and claiming at 70?
Usually from your own accounts. Harbor draws them in the order you specify, confirms the plan stays solvent across the gap, and shows the tax bracket each bridge year lands in.
What happens if I can't afford to wait until 70?
Harbor treats solvency as a gate, not a penalty: if delaying would leave spending unfunded, the recommendation is constrained to the latest age the household can actually afford, and that constraint is reported plainly rather than hidden inside a score.