401k calculator 소개
The projection runs one year at a time. Each year your salary grows, your contribution is the percentage you choose capped at the IRS elective deferral limit for your age, and the employer adds its match: a rate on your contributions up to one slice of salary, then a second rate on the next slice. Contributions go in monthly and the balance grows at the return you enter.
With the defaults, a 30-year-old earning $75,000 who saves 10% with a match of 100% on the first 3% and 50% on the next 2% puts in $7,500 this year and receives $3,000. Salary rising 3% a year and a 7% return build $2,807,522.39 by 67, or $1,349,325.95 in today's dollars at 2% inflation.
For 2026 the deferral limit is $24,500, plus $8,000 from age 50 or $11,250 at ages 60 to 63 (IRS Notice 2025-67). Later limits rise with the inflation you enter, in $500 steps. Taxes, fees and vesting schedules are not modeled.
자주 묻는 질문
How much can I contribute to a 401(k) in 2026?
$24,500 of elective deferrals, the limit in IRS Notice 2025-67. From the year you turn 50 you can add a catch-up of $8,000, for $32,500 in total, and in the years you turn 60, 61, 62 or 63 the catch-up is $11,250, for $35,750. Employee and employer contributions together, excluding catch-up, are capped at $72,000 under section 415(c).
How does a 401(k) employer match work?
The employer adds a percentage of what you contribute, up to a share of your pay. Under the IRS safe harbor basic formula, 100% of the first 3% and 50% of the next 2%, a $75,000 earner who contributes at least 5% ($3,750) receives $2,250 + $750 = $3,000. Contributing 2% ($1,500) would earn only $1,500, leaving $1,500 of match unclaimed.
What is the 401(k) super catch-up for ages 60 to 63?
SECURE 2.0 raised the catch-up limit for people who turn 60, 61, 62 or 63 during the year. For 2026 it is $11,250 instead of the $8,000 that applies from age 50, so the total deferral limit at those ages is $35,750. At 64 the regular $8,000 catch-up applies again.
Do high earners have to make catch-up contributions as Roth?
Yes, from 2026. If your 2025 wages from the employer sponsoring the plan were above $150,000, your 2026 catch-up contributions must be designated Roth, meaning they are made after tax (IRS Notice 2025-67, section 414(v)(7)). Your regular $24,500 of deferrals can still be pre-tax. The balance projected here is the same either way.
How much will my 401(k) be worth at retirement?
It depends mostly on the years left and the return. With the defaults, $7,500 a year from you and $3,000 from the employer, both rising 3% a year, grow to $2,807,522.39 over 37 years at 7%. Of that, $694,829.34 is contributions and $2,087,693.05 is investment growth. At a 5% return the same savings reach $1,814,452.59, 35% less.
“401k calculator”의 정확도는 어느 정도인가요?
정확도는 입력값과 계산 방법의 가정에 따라 달라집니다. 십진 연산은 유효숫자 50자리를 사용하지만, 추정값·수치해석 방법·원본 데이터의 정밀도는 더 낮을 수 있습니다. 표시값을 반올림해도 이러한 한계는 사라지지 않습니다. 독립적인 출처의 풀이와 대조한 계산 예시: 5. 예를 들어 “Defaults: age 30, $75,000, 10% with a 100%/3% + 50%/2% match”은 Python decimal (prec 50) year-by-year model: monthly deposits at the effective monthly rate, limits indexed in $500/$1,000/$5,000 steps와 대조해 확인합니다.
이 계산 방법의 출처는 무엇인가요?
IRS Notice 2025-67: 2026 amounts relating to retirement plans and IRAs; IRS news release IR-2025-111: 401(k) limit increases to $24,500 for 2026; IRS: Operating a 401(k) plan (safe harbor matching formula); 26 U.S.C. 402(g), 414(v) and 415(c): deferral, catch-up and annual additions limits.