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Retirement income in the United States rests on Social Security plus whatever was saved in tax-advantaged accounts, and the two follow opposite logics. Social Security is earnings-related but strongly progressive: the benefit formula replaces a high share of low earnings and a small share of high earnings, computed from the highest thirty-five years of indexed earnings, and the age at which it is claimed changes it permanently. Tax-advantaged saving, through a 401(k) or an IRA, is individual and comes in two flavours: traditional accounts deduct now and tax later, Roth accounts do the reverse. The calculators on these pages quantify both. The single decision with the largest effect is the claiming age for Social Security, where each year of delay to seventy raises the monthly benefit for life.
Pension Simulator United States
Estimate your Social Security benefit, project your 401(k) and IRA, and optimize your American retirement strategy.
Social Security
Estimate your Social Security benefit based on AIME and the PIA formula. Compare early, full, and delayed retirement.
Retirement Savings
Project your 401(k) and IRA. Compare Traditional vs Roth, employer matching, and withdrawal strategies.
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Full Retirement Age
67 yrs
For those born in 1960 or later
Maximum benefit
$4,152/mo
Maximum benefit in 2026 at age 67
Credits required
40
Approximately 10 years of work
401(k) limit
$24,500/yr
Maximum employee contribution 2026
Understanding the American retirement system
The American retirement system has evolved over nearly a century into a multi-layered framework. It began with the Social Security Act of 1935, signed by President Franklin D. Roosevelt during the Great Depression, creating the first federal safety net for retirees. The system was further strengthened by the Employee Retirement Income Security Act (ERISA) of 1974, which established standards for employer-sponsored pension plans and paved the way for the modern 401(k) – introduced in 1978 and popularized throughout the 1980s as companies shifted from defined-benefit pensions to defined-contribution plans.
The public pillar, Social Security, is a pay-as-you-go system funded by payroll taxes (6.2% from employees and 6.2% from employers on earnings up to $184,500 in 2026). Benefits are calculated using the Average Indexed Monthly Earnings (AIME) – an average of your 35 highest-earning years – and the Primary Insurance Amount (PIA) formula, which applies progressive bend points to ensure lower earners receive a higher replacement rate. The Full Retirement Age (FRA) is 67 for those born in 1960 or later, though you can claim reduced benefits as early as 62 or enhanced benefits by delaying up to age 70.
Private retirement savings form the second and third pillars of the system. The 401(k) plan, offered by employers, allows employees to contribute up to $24,500 per year (2026) in pre-tax or Roth dollars, often with an employer match that effectively doubles a portion of contributions. Individual Retirement Accounts (IRAs) – both Traditional and Roth – provide an additional $7,500 per year in tax-advantaged savings. The Roth option, available for both 401(k) and IRA accounts, allows after-tax contributions to grow and be withdrawn completely tax-free in retirement, making it particularly valuable for younger workers who expect to be in a higher tax bracket later in life.
Key points
Social Security
Social Security benefits are calculated using the Average Indexed Monthly Earnings (AIME) and the Primary Insurance Amount (PIA) formula. The PIA applies a progressive formula with bend points – in 2026, 90% of the first $1,286 of AIME, 32% of AIME between $1,286 and $7,749, and 15% above $7,749. The maximum benefit at Full Retirement Age is $4,152 per month in 2026. Benefits are adjusted annually for inflation through Cost-of-Living Adjustments (COLA), ensuring purchasing power is maintained over time.
Eligibility and retirement age
The Full Retirement Age (FRA) is 67 for anyone born in 1960 or later. You can claim benefits as early as age 62, but doing so results in a permanent reduction of up to 30%. Conversely, delaying benefits past FRA earns delayed retirement credits of 8% per year, up to age 70. To qualify for Social Security at all, you need at least 40 credits (roughly 10 years of work), with a maximum of 4 credits earned per year.
401(k) and IRA
The 401(k) is the cornerstone of employer-sponsored retirement savings, with an employee contribution limit of $24,500 per year in 2026. Many employers offer a matching contribution – commonly 50% to 100% of employee contributions up to 3-6% of salary – which is essentially free money. Individual Retirement Accounts (IRAs) allow an additional $7,500 per year in contributions. Both 401(k) and IRA accounts come in Traditional (pre-tax) and Roth (after-tax) variants, giving you flexibility in your tax planning strategy.
Tax advantages
Traditional 401(k) and IRA contributions are made with pre-tax dollars, reducing your taxable income today – withdrawals in retirement are taxed as ordinary income. Roth contributions are made with after-tax dollars, but qualified withdrawals in retirement are completely tax-free. Workers aged 50 and older can make catch-up contributions: an extra $8,000 for 401(k) plans and $1,100 for IRAs. Required Minimum Distributions (RMDs) begin at age 73 for Traditional accounts, forcing you to withdraw and pay taxes on a minimum amount each year. Roth accounts are exempt from RMDs during the owner's lifetime.
Recent reforms and SECURE Act
The SECURE 2.0 Act of 2022 introduced sweeping changes to retirement savings. The RMD age is rising from 72 to 73 (in 2023) and will reach 75 by 2033, giving savers more time for tax-deferred growth. New employers are now required to implement automatic enrollment in 401(k) and 403(b) plans starting in 2025, with a default contribution rate of 3-10%. The Act also introduced student loan matching, allowing employers to make retirement plan contributions on behalf of employees who are repaying student loans instead of saving. These changes aim to expand access and boost retirement readiness across the workforce.
Frequently asked questions
What is the retirement age in the United States?
The Full Retirement Age (FRA) is 67 for those born in 1960 or later. You can start claiming Social Security as early as 62, but your benefit will be permanently reduced by up to 30%. If you delay past FRA, your benefit increases by 8% per year until age 70, at which point there is no further increase. There is no mandatory retirement age in the United States for most private-sector jobs.
How is Social Security calculated?
Social Security uses a three-step process. First, your 35 highest-earning years are indexed for wage inflation and averaged to produce your AIME (Average Indexed Monthly Earnings). Then, the PIA (Primary Insurance Amount) formula applies progressive bend points: 90% of the first $1,286, 32% between $1,286 and $7,749, and 15% above $7,749 (2026 figures). Finally, the PIA is adjusted based on the age you claim – reduced for early filing, increased for delayed filing.
What retirement savings options exist?
The main employer-sponsored plan is the 401(k), with Traditional and Roth variants. Self-employed individuals can use a SEP-IRA or Solo 401(k). Anyone with earned income can open an IRA (Traditional or Roth), subject to income limits for Roth contributions and deductibility limits for Traditional IRA contributions. Government and nonprofit employees have access to 403(b) and 457(b) plans. Additionally, Health Savings Accounts (HSAs) can serve as a supplemental retirement vehicle with triple tax advantages.
How much will I receive from Social Security?
The average Social Security retirement benefit is approximately $2,071 per month in 2026, while the maximum benefit at FRA is $4,152 per month. Your actual benefit depends on your 35 highest-earning years, the age you claim, and annual COLA adjustments. Social Security is designed to replace roughly 40% of pre-retirement income for average earners. Higher earners see a lower replacement rate due to the progressive bend-point formula, making private savings essential for maintaining your standard of living.
Can I claim Social Security early?
Yes, you can claim as early as age 62, but your benefit will be permanently reduced. For someone with an FRA of 67, claiming at 62 means a 30% reduction in monthly benefits. Each month you claim before FRA reduces your benefit by approximately 0.56% (for the first 36 months) and 0.42% for each additional month beyond that. This reduction is permanent – it does not go away when you reach FRA. However, if you continue working while receiving early benefits, the earnings test may temporarily withhold some benefits if your income exceeds $24,480 (2026 limit).