Retirement Planning Fundamentals
Build a realistic plan that turns today's paycheck into income that lasts the rest of your life.
This course is for members
$9 unlocks every course in the library, this one included, plus a credit to build a topic of your own and at least 10 new courses every month.
What you will learn about Retirement Planning Fundamentals
The 7-day sprint
- Start With Spending, Not With a Magic Number. Your retirement target is set by what you expect to spend each year, minus the income you will already have, so spending is the first thing you measure.
- Compounding Is the Engine, Time Is the Fuel. Money invested grows on its own growth, so the earliest dollars you contribute do most of the work and a delay of a few years costs far more than it feels like it should.
- Use the Right Tax Wrapper, and Take the Match First. The same investment held inside a 401(k), an IRA, or a taxable brokerage account produces different after-tax results, so the order in which you fill accounts is a free source of return.
- Pick an Allocation and Keep Costs Low. Your mix of stocks and bonds drives most of your long-run result and your risk, and every basis point of fees comes straight out of that result.
- Social Security Is Inflation-Adjusted Income for Life. Claiming age permanently changes your monthly Social Security benefit, and for most people delaying is the cheapest protection available against living a long time.
- Turning the Pile Into a Paycheck. A sustainable withdrawal plan controls for the risk that poor returns arrive early in retirement, and it coordinates which accounts you draw from for tax reasons.
- Name the Risks and Write the Plan Down. A finished plan is one page that states your target, your contributions, your allocation, your claiming age, and your withdrawal rule, and that has been stress-tested against longevity, inflation, health costs, and an early retirement you did not choose.
The 80/20: the 7 concepts that matter most
- Your savings rate
- Time in the market and compounding
- The employer match and the right tax wrapper
- Asset allocation and costs
- Withdrawal rate and sequence of returns risk
- Social Security claiming age
- Health care timing and the big tail risks
The core idea, explained like you are 5
Retirement planning is building a machine that converts part of today's paycheck into a paycheck for the years when you no longer work, and compounding growth is the engine that makes the machine affordable.
Then the quiz and the ladder
10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.
Created Oct 25, 2026. No mistakes have been reported by learners.
Written from these sources
- 2026 401(k) Contribution Limits Issued by the IRS, asppa-net.org. day 3 and pareto 2026 contribution and catch-up limits.
- 2026 IRA and 401(k) Contribution Limits Are Set: What to Know Now, kiplinger.com. day 3 Roth IRA income phase-out ranges for 2026.
- 401(k) & IRA Contribution Limits 2026: $24,500 / $7,500, ustax.tools. day 3 separate IRA and workplace plan limits.
- Benefits Planner: Retirement, ssa.gov. day 5 and pareto delayed retirement credit rates.
- Benefits Planner: Retirement, ssa.gov. day 5 early claiming reduction at age 62.
- When Should You Claim Social Security Benefits?, ncoa.org. day 5 full retirement age table by birth year.
- Required Minimum Distribution (RMD) Rules for Original Owners of Retirement Accounts, congress.gov. day 6 and eli5 required minimum distribution start ages.
- 4% rule, en.wikipedia.org. day 6 and eli5 Bengen rule and Trinity study.
- Safe Withdrawal Rates for Retirement and the Trinity Study, retirementresearcher.com. day 6 SAFEMAX figure and Trinity success rates.
- William Bengen, en.wikipedia.org. expert stage on SAFEMAX and later revisions.
- Enrolling in Medicare Part A and Part B, medicare.gov. day 7 Medicare initial enrollment period and Part B penalty.
- I am turning 65 next year. When can I sign up for Medicare?, kff.org. day 7 timing of Medicare coverage start dates.
- 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500, irs.gov. 2026 401(k) and IRA limits in quiz and ladder.
- Retirement topics - Catch-up contributions, irs.gov. 2026 catch-up amounts for 401(k) and IRA.
- Publication 590-B (2025), Distributions from Individual Retirement Arrangements (IRAs), irs.gov. RMD timing and deadlines.
- Required Minimum Distributions: 2026 RMD Rules & Table, taxpayers.net. RMD start ages by birth cohort and 1959 ambiguity.
- The 4% Rule for Retirement Withdrawals Gets an Upgrade, kiplinger.com. 4% rule update to 4.7% and forward-looking estimates.
- 4% rule inventor William Bengen: Inflation is retirees' 'greatest enemy', cnbc.com. how the 4% rule applies only to year one.
- What is the Roth IRA 5-year rule and how does it work?, fidelity.com. Roth qualified distribution and five-year rule.
- Roth IRA withdrawal rules, empower.com. Roth IRAs have no lifetime RMDs.
- Required Minimum Distribution Age 73 Rules: SECURE 2.0 RBD, reedcorp.tax. missed RMD excise tax and required beginning date.