Quick answer
Starting ten years earlier can cut the required monthly saving by more than half for the same target, because compound growth supplies most of the final amount over long horizons. At 30, growth can supply five times your contributions; at 50, your contributions must do most of the work.
The numbers by age
Take a ₹2 crore target at 60 with a 10% annual return, starting from zero. At 30 (360 months) the required saving is ₹8,848 a month, with total contributions of ₹31,85,153 and growth of ₹1,68,14,847. The same target started at 40 (240 months) needs roughly double the monthly figure, and started at 50 (120 months) needs roughly five times it — because each decade removed takes away both contributions and the compounding those contributions would have earned.
The pattern is not linear: the first decade of saving matters more than the last, because money saved at 30 compounds for 30 years while money saved at 55 compounds for 5. That asymmetry is the whole argument for starting now rather than starting big later.
The $2 million table by starting age
At a 7% annual return, the monthly saving needed for $2 million by 62 is: $750 starting at 20, $1,050 at 25, $1,550 at 30, $2,250 at 35, $3,500 at 40, $5,500 at 45, $9,350 at 50 and $20,000 at 55. For retirement at 65: $600 at 20, $1,200 at 30, $2,700 at 40, $6,800 at 50 and $30,000 at 60. The table assumes annual compounding and no employer match.
Read the table as a cost of delay, not as a counsel of despair: every year of delay raises the figure, but every year of saving from now lowers it again. The worst starting age is always “next year”.
Where you should be: Fidelity milestones and median balances
Fidelity’s milestones — 1× salary by 30, 3× by 40, 6× by 50, 8× by 60, 10× by 67 — assume a 15% savings rate and retirement at 67. They are the standard yardstick, and falling short of them is common: the Federal Reserve’s 2022 survey found median transaction-account balances of $5,400 by age 34, $7,500 at 35–44, $8,700 at 45–54 and $8,000 at 55–64. Those are total balances, not retirement accounts, but they show how far typical savings sit from the milestones.
If you are behind, the response is not a higher assumed return — it is a higher savings rate, a later retirement age, or both. Both levers are still in your hands at any age.
If you are starting at 30
Your advantage is time, and the risk is complacency: a small monthly figure can feel so manageable that it never gets started. Fix the monthly amount from a target (use the goal calculator), automate it, and let the horizon do the work. A lower assumed return is the safer planning choice at this age, because the figure it produces leaves room for bad decades.
If you are starting at 45
The monthly figure is larger, but the plan is the same shape: pick the target, solve for the monthly amount, and consider the two levers that still move it — retiring a few years later, which adds both contributions and compounding, and raising the saving rate rather than chasing a higher assumed return. Catch-up contributions, where the tax rules allow them, exist for exactly this situation.
If you are starting at 55
With a short horizon, growth cannot rescue a small saving rate, so the monthly figure is dominated by the gap divided by the months. That is not a reason to skip the plan: it is a reason to set the target honestly, to count existing savings carefully (they may already cover more than expected), and to treat the retirement age as a variable rather than a fixed date.
Common mistakes to avoid
Assuming a high return to shrink the monthly figure; comparing your saving to someone else’s without comparing ages; ignoring inflation in the target; and delaying the start while waiting for a higher income — the lost compounding years cost more than the raise saves.
Related calculators
Use the Retirement Savings Goal Calculator to get your own monthly figure at your age, and the retirement-date tools to test later retirement ages.
Frequently asked questions
Why does starting early matter so much for retirement?
Because growth compounds: money saved at 30 compounds for 30 years, while money saved at 55 compounds for 5. Over long horizons growth can supply several times your contributions.
How much less do I save if I start at 30 instead of 40?
For the same target and return, starting ten years earlier can cut the required monthly amount by more than half.
What are Fidelity’s milestones?
1× salary by 30, 3× by 40, 6× by 50, 8× by 60 and 10× by 67, assuming a 15% savings rate and retirement at 67.
How much a month for $2 million at each starting age?
At 7% a year to age 62: $750 at 20, $1,550 at 30, $3,500 at 40, $9,350 at 50 and $20,000 at 55.
Is it too late to start at 50?
No, but the plan changes shape: the monthly figure is dominated by the gap divided by the months, so setting an honest target and considering a later retirement age matter more than return assumptions.
Should I assume a higher return to lower the monthly figure?
No. A higher assumed return shrinks the figure on paper and raises the risk of falling short. Use a conservative return and treat the figure as a planning guide.
Does retiring later really help that much?
Yes, twice over: more months of contributions and more months of compounding on everything saved so far.
What are catch-up contributions?
Extra contributions allowed above the usual limits once you reach 50, where the tax rules provide for them — designed for late starters.
How far behind is typical?
The Federal Reserve’s 2022 survey found median transaction balances of $5,400 by 34, $7,500 at 35–44, $8,700 at 45–54 and $8,000 at 55–64 — well below the Fidelity milestones for most people.
Is this guide financial advice?
No. It explains the math and the trade-offs; a retirement plan should be reviewed by a qualified adviser.