What if you invested $1,000 in Costco in 2015? (Inflation-Adjusted)
COST · Consumer · Adjusted to 2026 dollars using BLS CPI-U data
View nominal (non-adjusted) versionNominal returns can be misleading over long periods. $1,000 in Costco in 2015 became $8,607 by 2026. Over those 11 years, cumulative CPI inflation reached 39% (BLS CPI-U). Restating the return in constant purchasing power, the real value of your gain in 2015 dollars is $6,192, a real annualized return of +17.7%.
Nominal final value
$8,607
+760.7% total return
Real value (2015 dollars)
$6,192
+519.2% real total return
Real annualized return
+17.7%
vs. +21.1% nominal annualized
Year-by-Year (Inflation-Adjusted)
$1,000 in Costco since 2015, values in constant 2015 dollars
| Year | Nominal Value | Real Value (2015 $) |
|---|---|---|
| 2015 | $1,000 | $1,000 |
| 2016 | $1,103 | $1,087 |
| 2017 | $1,211 | $1,167 |
| 2018 | $1,515 | $1,417 |
| 2019 | $1,686 | $1,541 |
| 2020 | $2,424 | $2,180 |
| 2021 | $2,893 | $2,477 |
| 2022 | $4,179 | $3,277 |
| 2023 | $4,257 | $3,216 |
| 2024 | $5,963 | $4,376 |
| 2025 | $8,458 | $6,085 |
| 2026 | $8,158 | $5,869 |
Inflation adjustment uses BLS CPI-U annual data, deflated to 2026 dollars. Nominal stock data from Yahoo Finance (split-adjusted closing prices). Real values are expressed in constant 2015 purchasing-power dollars. For informational and educational purposes only. Not financial advice. Past performance does not guarantee future results. See our methodology and full disclaimer.