Crypto Newbie / Compound Interest Calculator
Compound Interest Calculator for crypto holdings
Compound growth is what happens when your returns earn returns of their own. This calculator projects your crypto stack 1 to 30 years out — combining a starting amount, monthly contributions, and an expected annual return. Best used as a planning tool, not a guarantee.
Crypto returns are nowhere near as predictable as stock-market historical averages, but compounding still applies whenever you hold and the price trends up. The math below uses monthly compounding by default — change the inputs to model your own scenario.
Projected value
- Total contributed
- $13,000.00
- Total interest
- $10,191.54
- Final value
- $23,191.54
ⓘ This is a projection, not a forecast. Real crypto returns have been highly variable — Bitcoin has had multiple 70%+ drawdowns. Use moderate assumptions (5–15% expected return) and stress-test with lower numbers.
What is compound interest in crypto?
Compound interest (or compound growth) means each period's gain is added to your balance, and the next period earns on the larger amount. Over decades, this snowballs. In crypto, you experience it whenever you hold an appreciating coin or stake for rewards that auto-restake. A $1,000 stack at 10% annual growth becomes ~$6,727 in 20 years — pure compounding, no extra deposits.
How does compounding work for crypto holders?
When you hold a coin and the price rises, you don't actively 'collect interest' — your unrealized gain just sits in the balance. If the next year's gain is calculated on the new (higher) balance, that's compounding.
True compound interest in crypto comes from staking, lending, or auto-restake products — protocols that let you earn rewards in the coin you stake, and those rewards immediately start earning more.
What annual return assumption is realistic?
There's no honest single number. Bitcoin's annualized return since 2013 is roughly 50%+, but that includes cycles where it dropped 80% twice. Equity markets average 7–10% real return long-term.
For planning, use bands: a pessimistic 0–5%, a moderate 8–12%, and an optimistic 15–25%. If your plan only works at 30%+ assumed returns, it's not a plan — it's a wish.
Why monthly contributions matter more than starting amount
Starting with $10,000 sounds powerful, but $200/month over 20 years at 10% grows to ~$152,000 — outperforming a one-time $10,000 buy that grows to ~$67,000 in the same period.
This is the magic of consistency. Try '0 starting / $200 per month' against '$10,000 starting / $0 per month' in the calculator above and compare the 20-year endpoints.
Common compounding mistakes
Two pitfalls hit beginners hardest:
- Assuming returns are smooth. Compound math assumes the rate applies every period — real returns are jagged. A 10% expected return might be 80% one year and -50% the next.
- Ignoring taxes and fees. If you're rebalancing or selling annually, taxes compound in the opposite direction.
Frequently asked questions
+Is compounding really that powerful for crypto?
Yes, over long horizons. The challenge is staying invested through drawdowns. Most retail traders sell after a 30% drop and miss the compounding window entirely.
+Does this account for taxes?
No — taxes vary too much by country. If you realize gains, your local capital-gains rules apply.
+What rate should I use for Bitcoin or Ethereum?
A moderate assumption is 8–12% annualized over a 10+ year horizon. More conservative would be 5%. Higher numbers are possible but come with big swings.
+Why doesn't my calculator match exchange staking previews?
Exchange previews often use simple interest (no compounding) and don't account for fee tiers. Our calculator uses monthly compounding by default.