Tools The Cost of Waiting
What does waiting to invest really cost?
Compound growth rewards time more than money: the early years do the heavy lifting. See how much less you’d have at retirement if you start investing a few years from now instead of today, and how much more you’d need to put in to catch up.
Your result
What to focus on next
How this calculator works
Cost of waiting = balance if you start today − balance if you start later
Both plans invest the same amount every month until the same retirement age. The only difference is when they start. Money grows at your expected return after inflation, compounded monthly, so the results are in today’s dollars.
With a positive return, the gap is bigger than the contributions you skip, because the money you’d have invested first has the longest to compound. The catch-up figure is the monthly amount the later start would need to end up at the same place.
Real returns vary from year to year, and nobody can promise any rate. The point isn’t the exact figure. It’s the shape: starting small today usually beats starting bigger later.
Words you’ll see
- Compound growth
- Earning returns on your past returns, not just on what you put in. Its effect grows with time.
- Real return
- Investment growth after inflation. Using it keeps every number in today’s dollars.
- Catch-up contribution
- Here, the larger monthly amount a later start needs to reach the same balance. (It’s also the IRS name for extra 401(k) and IRA contributions allowed from age 50.)
Common questions
How much does it cost to wait to invest?
Often far more than the contributions you skip. Investing $300 a month from age 25 to 65 at a 5% return after inflation grows to about $457,800. Waiting five years to start leaves about $340,800, which is $117,000 less, even though you only skipped $18,000 in contributions.
Why is it better to start investing early?
Compound growth earns returns on your past returns, so the money you invest first has the longest to grow. The early years do the heavy lifting, which is why starting small today usually beats starting bigger later.
How much more do I need to invest if I start later?
The later you start, the more each month has to do. To match $300 a month started at 25, someone starting at 30 needs about $403 a month, and someone starting at 35 needs about $550 a month, assuming a 5% return after inflation until 65.
What return does the cost of waiting calculator use?
It uses 5% a year after inflation unless you enter your own figure, compounded monthly, so every result is in today’s dollars. That is a common long-run planning figure for a stock-heavy mix, not a promise; real returns vary from year to year.
Sources
- Compound Interest Calculator, U.S. Securities and Exchange Commission, Investor.gov
- Retirement topics: Catch-up contributions, Internal Revenue Service
This tool is for informational and educational purposes only. It is not financial, tax, or legal advice. Consult a qualified professional for guidance specific to your situation.