Two Ways to Look at Future Money
When planning for financial goals, there are two ways to think about what money will be worth in the future. Understanding the difference between them is foundational to sound retirement planning:
Future Value (FV)
The amount of money you will have at a future date, based on an assumed rate of growth or interest. This number does not account for inflation — it tells you how many dollars you will have, but not how much those dollars will buy.
Real Future Value (RFV)
The future value adjusted for expected inflation. This is the more useful number for planning — it tells you what your future dollars will actually be worth in today’s purchasing power terms.
As inflation increases, the value of money decreases — meaning the same number of dollars will buy fewer goods and services in the future. The real future value accounts for this erosion and gives a more honest picture of your financial position.
The Formula
To calculate the real future value, we adjust the nominal future value for the compounding effect of inflation over time:
- Future Value — the nominal amount of money at a future date
- Inflation Rate — annual inflation rate expressed as a decimal (e.g., 3% = 0.03)
- n — number of years into the future
The formula divides your future nominal value by the compounding inflation factor. The larger inflation is and the longer the time horizon, the smaller the real future value becomes relative to the nominal figure — sometimes dramatically so.
Worked Example
Let’s walk through a concrete example to show what the formula actually produces:
- Future Value: $500,000
- Inflation Rate: 3% = 0.03
- Years (n): 20
- Inflation factor: (1 + 0.03)20 = 1.806
- Real Future Value: $500,000 ÷ 1.806 = $276,838
Your $500,000 in 20 years buys only what $276,838 buys today — a loss of nearly $223,000 in purchasing power, simply due to inflation.
How Inflation Erodes $100,000 Over Time
The table below shows the real future value of $100,000 today at different inflation rates and time horizons. The numbers illustrate why retirement planning must account for inflation over multi-decade periods:
| Time Horizon | 1% Inflation | 2% Inflation | 3% Inflation | 4% Inflation |
|---|---|---|---|---|
| 5 Years | $95,147 | $90,573 | $86,261 | $82,193 |
| 10 Years | $90,529 | $82,035 | $74,409 | $67,556 |
| 15 Years | $86,135 | $74,301 | $64,186 | $55,526 |
| 20 Years | $81,954 | $67,297 | $55,368 | $45,639 |
| 25 Years | $77,977 | $60,953 | $47,761 | $37,512 |
| 30 Years | $74,192 | $55,207 | $41,199 | $30,832 |
At 3% annual inflation — roughly the US historical average — $100,000 today has the purchasing power of only $41,199 in 30 years. A 30-year retirement at 4% inflation would see purchasing power drop to less than a third of its starting value.
What This Means for Your Investments
The real future value concept has a direct implication for how you should evaluate any investment or savings product: a return that does not exceed inflation is not growing your wealth — it is losing ground.
✕ Returns Below Inflation
- Traditional savings accounts (0.5–1%)
- Money market accounts (1–2%)
- CDs at current rates
- Some bond funds in high-inflation periods
✓ Strategies That Can Beat Inflation
- Indexed products (IUL, PPP) with market-linked growth
- Annuities with competitive growth options
- Diversified investment portfolios
- Real estate bridge lending (higher risk)
The key principle: your money must grow faster than inflation to preserve — and build — real wealth over time. Products that average 5–8% above a 3% inflation rate produce a real return of 2–5%. Products earning 1% in a 3% inflation environment are losing 2% of real value every year. Contact us to explore strategies designed to stay ahead of inflation.