Quick Answer
A 401(k) true-up contribution is an additional employer match payment made after year-end to ensure you receive the full match you earned, even if you hit contribution limits early. About 60% of large employers offer true-up provisions to prevent employees from losing matching dollars.
Best Answer
Marcus Rivera, Compensation & Benefits Analyst
Employees at companies with 401(k) plans who want to understand how employer matching works throughout the year
What is a 401(k) true-up contribution?
A 401(k) true-up contribution is an additional employer matching payment made after the end of the plan year to ensure you receive the full employer match you earned, regardless of when during the year you made your contributions. According to the Plan Sponsor Council of America's 2024 survey, approximately 60% of large employers (1,000+ employees) offer true-up provisions.
The true-up exists because of a timing mismatch problem. Most employers calculate matching contributions on a per-paycheck basis, but annual contribution limits can cause high earners to stop contributing mid-year, potentially missing out on matching dollars.
Example: How the true-up problem occurs
Consider Sarah, who earns $150,000 and wants to maximize her 2026 401(k) contribution of $23,500. Her company offers a 50% match on up to 6% of salary ($4,500 maximum match for the year).
Without true-up:
With true-up:
How true-up contributions work
Timing: True-up contributions typically occur in the first quarter of the following year, after payroll systems can calculate total annual compensation and contributions.
Calculation method: The employer compares two numbers:
1. Actual match paid during the year: Based on per-paycheck contributions
2. Annual match eligibility: Based on total salary and total employee contributions
If #2 is higher than #1, you receive a true-up payment for the difference.
Who benefits most from true-up provisions?
Key factors that affect true-up eligibility
What you should do
1. Check if your employer offers true-up by reviewing your 401(k) plan documents or asking HR
2. If no true-up exists, consider spreading your contributions evenly across all pay periods rather than front-loading
3. Use our paycheck calculator to model different contribution strategies and maximize your employer match
4. Don't reduce contributions if your plan has true-up — you'll still get your full match
Key takeaway: True-up contributions ensure you get your full employer match even if you hit the $23,500 contribution limit early, but only 60% of large employers offer this protection.
*Sources: [IRS Publication 560](https://www.irs.gov/pub/irs-pdf/p560.pdf), Plan Sponsor Council of America Annual Survey*
Key Takeaway: True-up contributions guarantee you receive your full employer match regardless of contribution timing, but check if your employer offers this feature since only 60% do.
Comparison of employer matching scenarios with and without true-up contributions
| Scenario | Total Contributions | Match Without True-Up | Match With True-Up | Difference |
|---|---|---|---|---|
| $100k salary, max out by Nov | $23,500 | $3,200 | $4,000 | +$800 |
| $150k salary, max out by Oct | $23,500 | $3,800 | $4,500 | +$700 |
| $200k salary, max out by Sep | $23,500 | $4,500 | $6,000 | +$1,500 |
More Perspectives
Marcus Rivera, Compensation & Benefits Analyst
Workers 50+ who are making catch-up contributions and want to maximize employer matching in their final working years
True-up contributions for pre-retirees
As someone approaching retirement, true-up contributions become especially valuable because you're likely maximizing both regular contributions ($23,500) and catch-up contributions ($7,500 for ages 50-59, or $11,250 for ages 60-63 under the new super catch-up rules).
The challenge: When you contribute $31,000 annually ($2,384 per biweekly paycheck), you'll hit the limit by mid-November, potentially missing 2-3 paychecks worth of employer matching.
Example for a 55-year-old
John earns $120,000 and contributes the maximum $31,000 (including $7,500 catch-up). His employer matches 100% of the first 3% of salary:
Special considerations for catch-up contributions
Most true-up provisions apply only to regular deferrals, not catch-up contributions. This means:
Retirement timing strategy
If you're planning to retire mid-year, true-up timing becomes crucial:
Key takeaway: True-up contributions are especially valuable for pre-retirees making large contributions, but verify employment requirements if planning mid-year retirement.
Key Takeaway: Pre-retirees benefit most from true-up provisions when maximizing contributions, but employment on December 31st is typically required to receive the payment.
Marcus Rivera, Compensation & Benefits Analyst
High earners who max out 401(k) contributions early in the year and risk missing employer matching on later paychecks
True-up for high earners
As a highly-compensated employee, you face unique 401(k) challenges that make true-up contributions essential. You likely max out the $23,500 contribution limit well before year-end, creating a matching gap that can cost thousands annually.
The high earner's dilemma
Example: You earn $200,000 and want to contribute the maximum $23,500. Contributing $902 per biweekly paycheck means you'll hit the limit by late October, missing 6-8 weeks of potential employer matching.
With a typical 50% match on 6% of salary, you're eligible for $6,000 annually in matching. Without true-up, you could lose $1,000-1,500 in matching from those final paychecks.
HCE testing implications
True-up contributions can also help with nondiscrimination testing:
Maximizing your strategy
1. Front-load contributions if your plan has true-up — you'll still get full matching
2. Consider mega backdoor Roth if your plan allows after-tax contributions
3. Coordinate with spouse's plan if both are high earners with different true-up policies
Key takeaway: High earners benefit most from true-up provisions, potentially saving $1,000+ annually in matching that would otherwise be lost to contribution timing.
Key Takeaway: High earners can lose $1,000+ in matching without true-up provisions, making this feature crucial for maximizing retirement savings.
Sources
- IRS Publication 560 — Retirement Plans for Small Business
- Plan Sponsor Council of America — Annual Survey of Profit Sharing and 401(k) Plans
Reviewed by Marcus Rivera, Compensation & Benefits Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.