Planning concepts
Savings after tax and inflation: the real return
A savings, taxes and inflation calculator: clients enter a deposit, monthly contributions, years, return, tax rate on returns and inflation to see nominal, after-tax and real values.
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What is the real return on savings after taxes and inflation?
Reduce the return by tax on it, then subtract inflation. A 4% savings rate taxed at 24% nets about 3.04%; with 3% inflation, the real return is close to zero. The account balance grows, but its purchasing power barely does, which is why long-term money usually needs growth investments.
When 1099-INT forms show interest earned
Higher savings rates make cash feel productive, and tax forms show the interest. Clients wonder whether they're actually getting ahead once tax and inflation are counted.
What the client types into a search box
“is my savings account keeping up with inflation”
How a client works through it
Enter deposit and contributions
Starting amount and monthly additions.
Enter years and return
Time frame and interest or return rate.
Enter tax and inflation rates
Tax on returns and expected inflation.
See real value
Nominal, after-tax and real values, and purchasing power lost.
What lands in your inbox
When a client asks your firm to review the result, the request arrives as a contact record with their inputs and results attached, by email and, on paid plans, by webhook to your CRM.
Received
Deposit size, contributions, rates and horizon show how much cash a client holds and for how long. Large balances held for many years suggest an investment conversation.
Nominal, after-tax and real
Nominal Future Value ignores tax and inflation. After-Tax Future Value removes tax on returns. Real Value (Today's $) also removes inflation. Purchasing Power Lost shows the gap.
Total Contributions shows what went in; a real value close to it means little real growth.
Results shown: Real Value (Today's $) · Nominal Future Value · After-Tax Future Value · Total Contributions · Purchasing Power Lost.
4% interest, 24% tax, 3% inflation
4% × (1 − 0.24) = 3.04% after tax. Subtracting 3% inflation leaves roughly 0.04% real return, essentially standing still.
Why real returns matter to CPA firms and planners
Interest is taxed as ordinary income, which CPAs see every season. Showing the real return helps clients decide how much cash to hold and where.
Planners use it to explain why long-term money belongs in growth investments.
Follow-ups this request opens
- Set an emergency fund target and invest the rest
- Use tax-advantaged accounts for savings
- Consider Treasury or municipal options
- Review asset allocation
What this calculator leaves out
- Tax modeled as a flat reduction of returns.
- Constant rates.
- State tax only if included.
- No account-type differences.
Platform disclaimer shown under the calculator: Estimates only. Models tax as a flat reduction of the annual return and discounts the result by inflation; real tax treatment and inflation vary. Consult a financial professional.
Compliance note for firms
Real-return comparisons are educational. Recommending moving cash into investments is advice that should consider liquidity needs and risk tolerance.
Not legal advice. See our disclaimer and the guide to compliance for client calculators.
Terms your client sees in the calculator
These definitions appear in the calculator's collapsible Definitions block, so clients don't have to call to ask what a label means.
- Real value (today’s dollars)
- The after-tax future balance converted back to today’s purchasing power by discounting it for inflation. It answers what the money will buy, not how many dollars it will be. A balance can grow in nominal terms and still lose real value if taxes and inflation together exceed the return.
- Nominal future value
- The balance your deposits would reach at the full pre-tax return, with no allowance for taxes or inflation. It is the headline figure most savings projections show. Comparing it with the after-tax and real values in this calculator shows how much of the apparent growth is lost to each.
- After-tax return
- The return left after tax on investment gains. This calculator models tax as a flat reduction of the annual return: a 6% return taxed at 24% becomes about 4.56%. Real tax treatment varies by account and income type, and tax-advantaged accounts can avoid or defer this reduction.
- After-tax future value
- The balance your deposits reach when growing at the after-tax return. The gap between this and the nominal future value is the growth lost to taxes over the period, which compounds: tax paid each year also removes the future growth that money would have earned.
- Inflation
- The general rise in prices over time, which reduces what each dollar can buy. The calculator uses your inflation rate to discount the after-tax future balance into today’s dollars. Even modest inflation matters over long periods: at 3% a year, prices roughly double in about 24 years.
- Purchasing power lost
- The difference between the after-tax future balance and its real value in today’s dollars. It is not money that leaves your account; it is the buying power the same dollars lose as prices rise. Seeing it alongside the tax figures shows which of the two costs weighs more on your savings.
In our glossary: Real return
Savings, Taxes and Inflation calculator: questions from firms and clients
Is interest taxable?
Generally as ordinary income, except municipal and some Treasury interest at the state level.
What's a real return?
Return after inflation.
Should I keep less cash?
Keep enough for emergencies; long-term money may belong elsewhere.
Does it include state tax?
Add it to the tax rate.
What inflation rate should I use?
Test 2% to 4%.
Do CDs help?
They can lock rates, but tax and inflation still apply.
What about I bonds or TIPS?
They're designed to track inflation; ask your adviser.
Which plan includes it?
Firm and Network. See pricing.
No question matches that filter. Clear it to see them all, search the whole site, or ask us directly; we reply within one business day.
Clients who ask this usually ask next
Inflation Impact
how much will things cost in 20 years
Future Value
how much will my money grow if I invest it
Taxable vs. Tax-Deferred
is it better to invest in a taxable account or tax deferred
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