How does retirement work? It runs in two phases: years of saving, then years of turning those savings and benefits into steady income.
Key Takeaways
- Retirement has two phases: accumulation (saving and investing while you work) and decumulation (drawing income once you stop). See the overview of types of retirement income.
- Most retirees combine three income streams: Social Security, any pension, and personal savings such as a 401(k) or IRA, per the U.S. Bureau of Labor Statistics and SSA.
- Age 59.5 is when the IRS 10% early-withdrawal penalty on most retirement accounts ends (IRS Topic No. 557).
- Social Security can begin as early as 62, but Full Retirement Age is 67 for anyone born in 1960 or later, and delaying past that raises the monthly check (SSA).
- Medicare eligibility generally begins at 65, with a 7 month enrollment window around your birthday month (Medicare.gov).
- Required Minimum Distributions start at age 73 for people born 1951 to 1959, and 75 for those born in 1960 or later (IRS, SECURE 2.0 Act).
- In 2026 workers can defer up to $24,500 to a 401(k) and contribute up to $7,500 to an IRA, with larger catch-up amounts after 50 (IRS).
Retirement By The Numbers: Key Ages
Figures reflect 2026 rules. Full Retirement Age is 67 for anyone born in 1960 or later. Confirm your own dates against SSA.gov and IRS.gov.
What Does It Actually Mean to Retire?
Retirement is the point at which a person stops relying on a paycheck and starts living on income they have built or earned the right to receive. In plain terms, the money that used to come from an employer now comes from a mix of government benefits, any pension, and personal savings.
The whole system rests on two ideas. First, you set aside money during your working years and let it grow. Second, you convert that money, plus Social Security and any pension, into a stream of income that lasts the rest of your life. Everything else in retirement planning is detail layered on top of those two ideas.
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What Are the Two Phases of Retirement?
Retirement works in two distinct phases: accumulation and decumulation. Understanding which phase you are in tells you what your money is supposed to be doing.
During accumulation, you are working and saving. Contributions go into accounts like a 401(k) or an IRA, employers may add a match, and investments compound over decades. During decumulation, the flow reverses: you stop contributing and begin withdrawing, ideally in a tax-aware order. A helpful primer is when you should start saving for retirement, because time in the accumulation phase does most of the heavy lifting.
| Feature | Accumulation phase | Decumulation phase |
|---|---|---|
| Typical timing | Working years, roughly ages 25 to 65 | Retirement years, roughly 60s onward |
| Money flow | Money going in (contributions plus growth) | Money coming out (withdrawals plus benefits) |
| Main goal | Build a nest egg and let it compound | Create durable, tax-efficient income |
| Key decisions | How much to save, which accounts, how to invest | When to claim Social Security, withdrawal order, RMDs |
| Big risks | Saving too little, starting too late | Outliving savings, taxes, sequence of returns |
Where Does Retirement Income Come From?
Retirement income generally comes from three sources, often described as a three legged stool: Social Security, pensions, and personal savings. Most retirees rely on some blend of the three rather than any single one.
Social Security is a government benefit funded by payroll taxes and based on your lifetime earnings; the Social Security Administration explains how the benefit amount is figured, and you can read a plain summary of how Social Security is calculated. Pensions, more formally defined benefit plans, promise a set monthly amount and are now most common among government and union workers. Personal savings covers everything you set aside yourself, chiefly workplace plans and IRAs. For a fuller breakdown, see the guide to retirement income planning, which also covers how each source is taxed.
What Account Types Hold Retirement Savings?
Most personal retirement savings sit in a handful of account types, grouped by who sponsors them and how they are taxed. A high level map is available in the guide to types of retirement accounts.
Workplace plans such as the 401(k), 403(b), and TSP are usually defined contribution plans, meaning the balance depends on contributions plus investment results rather than a promised payout. You can see the mechanics in the explainer on how a 401(k) works. Individual accounts you open yourself include the traditional IRA and Roth IRA, covered in how an IRA works. The core split is tax treatment: traditional accounts are funded pretax and taxed on withdrawal, while Roth accounts are funded with after tax dollars and grow tax free.
| Account | Who offers it | 2026 contribution limit | Tax treatment |
|---|---|---|---|
| 401(k) / 403(b) / TSP | Employer sponsored | $24,500 deferral ($8,000 catch-up at 50+) | Traditional (pretax) or Roth (after tax) |
| Traditional IRA | Opened by the individual | $7,500 ($8,600 at 50+) | Often pretax; taxed at withdrawal |
| Roth IRA | Opened by the individual | $7,500 ($8,600 at 50+) | After tax in; qualified withdrawals tax free |
| HSA (retirement-capable) | With a qualifying health plan | $4,400 self / $8,750 family | Triple tax advantaged for medical costs |
Source: IRS 2026 contribution limits. Catch-up amounts differ; workers ages 60 to 63 can defer an extra $11,250 to a workplace plan.
How Do You Turn Savings Into Income?
You turn savings into income by setting a sustainable withdrawal rate and pulling from accounts in a deliberate order. The goal is to fund your lifestyle without running out of money or paying more tax than necessary.
One long standing rule of thumb is the 4% guideline, in which a retiree withdraws about 4% of the portfolio in year one and adjusts for inflation after that; its tax angle is discussed in the 4% rule and taxes. Just as important is the order of withdrawals across taxable, tax deferred, and Roth accounts, which is the subject of tax-efficient withdrawal strategy. Retirees in a lower income year, for example the window between leaving work and starting Social Security, often ask a financial professional to model whether a Roth conversion makes sense before withdrawals and RMDs push them into a higher bracket.
Which Ages Matter Most in Retirement?
A short list of ages drives most retirement decisions because each one unlocks or requires something specific. Missing them can cost money in penalties or higher taxes.
At 59.5, the 10% early distribution penalty on most retirement accounts ends, per IRS rules. At 62, Social Security retirement benefits can begin, though at a permanently reduced amount. At 65, Medicare eligibility generally begins. At 67, anyone born in 1960 or later reaches Full Retirement Age, the point at which Social Security pays the unreduced benefit; the tradeoffs are covered in when to take Social Security. Finally, Required Minimum Distributions begin at 73 or 75 depending on birth year, detailed in the guide to required minimum distributions for 2026.
| Age | What it unlocks or requires | Source |
|---|---|---|
| 59.5 | 10% early-withdrawal penalty ends on most accounts | IRS |
| 62 | Earliest Social Security claim (reduced benefit) | SSA |
| 65 | Medicare eligibility generally begins | Medicare.gov |
| 67 | Full Retirement Age (born 1960 or later) | SSA |
| 70 | Maximum delayed retirement credits stop accruing | SSA |
| 73 or 75 | RMDs begin (73 born 1951 to 1959; 75 born 1960 or later) | IRS |
How Does Health Coverage Fit In?
Health coverage is a core part of how retirement works because Medicare has its own timeline that runs alongside your income plan. Most people become eligible at 65 regardless of when they claim Social Security.
Medicare has a seven month Initial Enrollment Period that spans the three months before your 65th birthday month, that month, and the three months after, according to Medicare.gov. Premiums, deductibles, and income related surcharges change each year; a current summary appears in the overview of Medicare cost in retirement for 2026. Because certain income can raise Medicare premiums, health coverage and income planning are usually handled together rather than separately.
How Are Taxes Involved in Retirement?
Taxes touch nearly every retirement dollar, but the rate depends on the source and the account. Understanding this early is what lets retirees keep more of what they saved.
Withdrawals from traditional 401(k)s and IRAs are generally taxed as ordinary income, while qualified Roth withdrawals are tax free. Social Security is partly taxable once combined income passes fixed thresholds of $25,000 to $34,000 for single filers and $32,000 to $44,000 for joint filers, with up to 85% of the benefit taxable above the top figure (these thresholds are set by law and are not indexed to inflation). Managing which accounts you draw from, and in which years, is the reason many households build a multi year plan rather than deciding one withdrawal at a time.
Frequently Asked Questions
At what age can I retire?
There is no single legal retirement age. You can stop working whenever your savings and benefits can support you. Practical milestones matter more: 59.5 for penalty-free account withdrawals, 62 for the earliest Social Security, 65 for Medicare, and 67 for Full Retirement Age if you were born in 1960 or later, per SSA and IRS rules.
How much money do I need to retire?
The amount depends on your spending, other income sources, and how long retirement lasts. A common starting point is the 4% guideline, which suggests a portfolio can support an initial annual withdrawal near 4%. Because everyone’s Social Security, pension, and tax picture differs, a financial professional can model a number specific to your situation.
What are the three main sources of retirement income?
Social Security, pensions (defined benefit plans), and personal savings such as 401(k)s and IRAs. Most retirees combine some mix of the three rather than relying on any single source, and how each is taxed varies.
What is the difference between a 401(k) and an IRA?
A 401(k) is offered through an employer and often includes a match, with a 2026 employee deferral limit of $24,500. An IRA is opened by the individual and has a 2026 limit of $7,500 ($8,600 at age 50 or older). Both come in traditional (pretax) and Roth (after tax) versions.
When do Required Minimum Distributions start?
RMDs begin at age 73 for people born from 1951 to 1959, and at 75 for those born in 1960 or later, under the SECURE 2.0 Act. They apply to traditional (pretax) accounts, not to Roth IRAs during the original owner’s lifetime, per the IRS.
Can I take money out of my retirement account before 59.5?
Yes, but withdrawals from most retirement accounts before age 59.5 typically trigger a 10% early distribution penalty plus ordinary income tax, according to the IRS. Limited exceptions exist, such as certain substantially equal periodic payments, so the rules should be checked before acting.
Do I have to take Social Security and Medicare at the same time?
No. Medicare eligibility generally begins at 65, while you can claim Social Security anywhere from 62 to 70. They are separate decisions, though enrolling in Medicare on time matters because late enrollment can create lasting penalties, per Medicare.gov.
How does a Roth conversion fit into retirement?
A Roth conversion moves money from a pretax account into a Roth account, paying tax now so future qualified withdrawals are tax free and not subject to RMDs. Retirees in a lower bracket year sometimes explore whether converting reduces lifetime taxes; a financial professional can model whether it fits a specific plan.
Citations: SSA, benefit reduction by age; SSA, delayed retirement credits; IRS Topic No. 557, additional tax on early distributions; IRS, RMD FAQs; IRS, 2026 contribution limits; Medicare.gov, when coverage starts; SSA, taxation of benefits.
This article is for educational purposes only and is not individualized investment, tax, or legal advice. Consult a qualified professional about your specific situation.
