A record number of retirement savers hit seven figures inside their workplace accounts last quarter. A 401(k) is a tax-deferred account: employees set aside a slice of each paycheck before income taxes apply, the money grows inside the plan over years or decades, and ordinary income tax comes due only at withdrawal. Fidelity counted 769,000 such accounts above the million-dollar threshold in the second quarter, the highest total the firm has ever recorded.

A 401(k) balance grows two ways: new contributions arrive each pay period, and the existing balance earns returns on whatever the account holds, commonly index funds tied to the broad stock market. When equity prices rise broadly and hold their gains, both forces compound. A sustained rally lifts balances that have been accumulating for decades, pushing the furthest-along accounts past major thresholds. The record at Fidelity in the second quarter reflects how far a sturdy stock market can carry a balance that has had time to grow.

The 769,000 is a count of accounts, not a census of individual savers. A worker who changed jobs and left a previous plan open at Fidelity could appear more than once in the total. Fidelity also covers only a portion of the national retirement market, so the full count of million-dollar 401(k) accounts across all administrators runs higher. The record stands on its own terms, and the second-quarter figure of 769,000 is the number that holds.

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