401k Calculator
Professional 401(k) projection tool with inflation adjustment, tax-deferred growth modeling, and employer match maximization analysis.
About
Retirement planning is not just about accumulating a large nominal number; it is about securing future purchasing power. This advanced 401(k) analytical tool goes beyond simple multiplication. It integrates salary trajectory analysis, smart contribution limits (including catch-up contributions for those over 50), and crucially, inflation-adjusted projections.
Most calculators fail to account for the erosion of money's value over time. A million dollars in 30 years will not buy what a million dollars buys today. By calculating the Real Value alongside the Nominal Value, this tool provides a brutally honest look at your financial future. It is designed for employees who need to optimize their Pre-Tax savings strategy to ensure their lifestyle remains sustainable post-employment.
Formulas
The calculator employs a discrete time-step simulation to model the growth of the fund. The Real Value (Purchasing Power) is derived by discounting the Nominal Value by the cumulative inflation rate.
Where Ct is the total contribution in year t (Employee + Employer), r is the annual return, and N is the total years to retirement. To find the purchasing power in today's dollars:
Here, i represents the average annual inflation rate.
Reference Data
| Year | 401(k) Limit ($) | Catch-Up ($) | Total Limit ($) | Avg. Inflation (%) |
|---|---|---|---|---|
| 2025 | 23,500 | 7,500 | 31,000 | Proj. |
| 2024 | 23,000 | 7,500 | 30,500 | 2.9 |
| 2023 | 22,500 | 7,500 | 30,000 | 4.1 |
| 2022 | 20,500 | 6,500 | 27,000 | 8.0 |
| 2021 | 19,500 | 6,500 | 26,000 | 4.7 |
| 2020 | 19,500 | 6,500 | 26,000 | 1.2 |
| 2019 | 19,000 | 6,000 | 25,000 | 1.8 |
| 2018 | 18,500 | 6,000 | 24,500 | 2.4 |
| 2017 | 18,000 | 6,000 | 24,000 | 2.1 |
| 2016 | 18,000 | 6,000 | 24,000 | 1.3 |
| 2015 | 18,000 | 6,000 | 24,000 | 0.1 |
| 2014 | 17,500 | 5,500 | 23,000 | 1.6 |
| 2013 | 17,500 | 5,500 | 23,000 | 1.5 |
| 2012 | 17,000 | 5,500 | 22,500 | 2.1 |
| 2011 | 16,500 | 5,500 | 22,000 | 3.2 |
| 2010 | 16,500 | 5,500 | 22,000 | 1.6 |
| 2009 | 16,500 | 5,500 | 22,000 | -0.4 |
| 2008 | 15,500 | 5,000 | 20,500 | 3.8 |
| 2007 | 15,500 | 5,000 | 20,500 | 2.8 |
| 2006 | 15,000 | 5,000 | 20,000 | 3.2 |
| 2005 | 14,000 | 4,000 | 18,000 | 3.4 |