Compounding, the 4% rule, Social Security and drawdown.
A secure retirement rests on a few big levers: how much you save, how long it compounds, what you'll need to spend, and how you draw it down. This guide explains each lever and links to the calculator that models it.
The single most powerful force in retirement saving is compound growth - earning returns on your returns. Money invested in your 20s and 30s has decades to multiply, which is why starting early matters far more than starting big. A modest amount invested consistently for 40 years routinely outgrows a larger amount invested for 20. Time in the market, not timing the market, does the heavy lifting.
A common planning shortcut is the 4 percent rule: you can withdraw about four percent of your portfolio in the first year of retirement, adjust for inflation thereafter, and historically have a strong chance of not running out over 30 years. Flip it around and your target nest egg is roughly 25 times your annual expenses. The FIRE Number Calculator turns your expected spending into a financial-independence number and estimates the years to reach it from where you are today.
Social Security is the backbone of most retirement income, and when you claim changes the benefit permanently. Claiming as early as 62 reduces your monthly check; waiting past full retirement age adds roughly eight percent per year up to age 70. There's no universally right answer - health, other income and longevity in your family all matter - but understanding the trade-off is essential. The Social Security Calculator shows how your monthly benefit changes by claiming age.
Accumulating is only half the journey; the decumulation phase - turning a balance into reliable income - is just as important. Two questions dominate: how long will my money last at a given withdrawal rate, and how much steady income can a lump sum produce? The Savings Withdrawal Calculator projects how long a balance lasts given your return, withdrawals and inflation, and the Annuity Calculator estimates the level income a lump sum can pay out over a set period.
Two quieter risks deserve respect. Inflation erodes purchasing power - what costs a dollar today may cost far more in 25 years - so your income needs to grow over retirement, not stay flat. Sequence-of-returns risk is the danger of poor market returns early in retirement, which can permanently damage a portfolio you're drawing from. Holding a cash and bond buffer and staying flexible with withdrawals in down years are the main defenses.
Save consistently and start as early as you can; invest for growth while you have time, then add stability as you approach retirement; target roughly 25 times your expenses; coordinate your Social Security claiming age with the rest of your plan; and in retirement, draw down at a sustainable rate with room to adjust. None of these requires perfect prediction - just steady, informed decisions.
A common target is about 25 times your annual expenses, based on the 4 percent withdrawal rule.
Withdraw about four percent of your portfolio the first year and adjust for inflation; historically this lasts about 30 years.
Claiming later (up to 70) raises your monthly benefit about eight percent per year past full retirement age; the right age depends on health and other income.
It depends on your withdrawal rate, returns and inflation - model it with the savings-withdrawal calculator.
Compounding rewards time; money invested decades earlier multiplies far more, even if the amount is smaller.