Automatic enrollment has quietly become the most effective retirement policy of the last 25 years. It has also created a new problem: millions of savers who have never once chosen how much they save.
The participation win is real
Vanguard's How America Saves 2026, the 25th edition of a study tracking nearly 5 million workers, found participation among eligible employees hit a record 86% — up from 65% when the series began. As of year-end 2025, 61% of Vanguard plans permitting employee deferrals had adopted automatic enrollment.
SECURE 2.0 is pushing that number higher. Under Section 414A, most 401(k) and 403(b) plans established after December 29, 2022 must automatically enroll new hires for plan years beginning after December 31, 2024. The required initial rate is at least 3% and no more than 10%, escalating 1 percentage point annually to at least 10% but no more than 15%. The IRS issued proposed regulations in January 2025, and final rules have been under White House budget-office review since June 23, 2026. The plan document amendment deadline for calendar-year plans is December 31, 2026.
The part savers miss
Defaults are sticky. Research cited by the Employee Benefit Research Institute finds that when plans default participants at 3%, participants tend to stay at 3% — and every job change can reset the clock, re-anchoring a saver at a lower rate. Plan designers also warn of an "endorsement effect": employees read the default as the employer's recommendation and assume it's sufficient.
It usually isn't. The 3% figure traces back to an example used in IRS guidance more than 20 years ago, not to any analysis of retirement adequacy.
The market has started to move. Vanguard found nearly two-thirds of auto-enrollment plans now default at 4% or higher, and about one-third default at 6% — both all-time highs. Seventy-one percent of auto-enrollment plans also escalate deferrals automatically each year.
What adequate actually looks like
The gap between a default and a real savings rate shows up in Vanguard's own numbers. The average employee deferral rate was 7.6% (median 6.6%). Including employer contributions — where the average match reached a record 4.7% — the average total contribution rate was 12.1%, with a median of 11.6%. Forty-five percent of participants raised their savings rate in 2025.
A worker sitting at a 3% default with a 4.7% match is contributing roughly 7.7% total — meaningfully below the median participant.
Practical takeaways
- Find out your actual deferral rate. If you were auto-enrolled and never changed it, assume you are at the default.
- Capture the full match first. A 3% default frequently leaves employer money unclaimed. Confirm your plan's match formula.
- Turn on auto-escalation if your plan offers it and you aren't enrolled. Roughly 29% of auto-enrollment plans still don't apply it automatically.
- Re-set your rate after a job change. A new employer's default overrides whatever you had built up.
- Know your ceiling. For 2026, the base 401(k) elective deferral limit is $24,500, with an $8,000 catch-up at 50+ and an $11,250 "super catch-up" for ages 60–63.
- Read the auto-enrollment notice. It explains your opt-out rights, the escalation schedule, and the default investment.
Context matters here: EBRI's 2026 Retirement Confidence Survey found worker confidence fell from 67% to 61% and retiree confidence from 78% to 73%, with 60% of workers saying housing costs are already hurting their ability to save. Automatic enrollment removes the hardest step. Choosing the rate is still yours.
Sources: Vanguard, How America Saves 2026; PLANSPONSOR; IRS / SECURE 2.0 Section 414A guidance; EBRI 2026 Retirement Confidence Survey; Kiplinger