Data as of Q4 2026
Bitcoin Fee Index methodology
Methodology as of Q4 2026: rank partners by annual fee drag at a stated monthly euro contribution. The formula is the one used by the live Stacking Strategist: a percentage of each purchase plus any monthly subscription. Not a brokerage quote.
Inputs
| Partner | Method | pct | fixed | monthly | Flag |
|---|---|---|---|---|---|
| 21bitcoin | Auto-Invest plan | 0 | 0 | 0 | as published |
| ByBit EU | Spot trading | 0.0025 | 0 | 0 | as published |
| Kraken | Pro trading | 0.008 | 0 | 0 | as published |
Formula
costPerPurchase = contribution * pct + fixed + monthly / (periodsPerYear / 12) annualDrag = costPerPurchase * periodsPerYear
Default: periodsPerYear = 12, as in the live Stacking Strategist.
Out of scope
- Bid/ask spread
- Currency conversion from CZK, PLN, HUF, RON or BGN into EUR
- Bitcoin network miner fees
- Promotional discounts that are not in the schedule
FAQ
Where do the percentages come from?
From the partners’ published fee pages, checked on 2 October 2026: 21bitcoin Auto-Invest 0% (from day 8), ByBit EU 0.25% and Kraken Pro 0.8% (taker fee for a plain market buy at the entry tier).
What is the annual-drag formula?
costPerPurchase = contribution × pct + fixed + monthly / (periodsPerYear / 12); annualDrag = costPerPurchase × periodsPerYear. The same formula as the live Stacking Strategist.
How often will this change?
When a partner changes its published fees, the schedule is updated and a new quarterly snapshot is published. Archive URLs stay stable.
See fees in Stacking Strategist →