What Stackk costs
A small fee, fixed in the contract, and nothing on buys that don’t go through
| Part | Cost |
|---|---|
| Stackk fee | 0.25% of each buy that fills |
| Swap into Bitcoin | about 0.2% on a $10 buy, less on bigger ones |
| Tip to whoever triggers the buy | 1¢ by default, and you can change it |
| Sending real Bitcoin | about 0.1–0.5% per batch |
| Sonic gas | paid by the keeper |
| Unfilled buys and withdrawals | free |
The Stackk fee
- It’s 0.25% of the amount of each buy that fills
- It’s set in the contract and capped at 0.5% in the code, so it can’t be raised on your vault
- We’re paid only when a buy fills. A buy that nobody fills is cancelled and refunded in full, fee included.
- There’s no fee on sending Bitcoin or on withdrawals
A $10-a-day plan, over a month
| Part | Cost over 30 days |
|---|---|
| 30 buys of $10, swapped (about 0.19% each) | about $0.57 |
| One batch of about $300 to Bitcoin (0.11–0.51%) | $0.33 to $1.53 |
| Stackk fee (0.25% of each buy) | $0.75 |
| Tips to whoever triggers each buy (1¢ each) | $0.30 |
| All in | about $1.95 to $3.15, or 0.65–1.05% of $300 |
Sending each of those 30 buys to the Bitcoin network separately would cost about $15.60 on its own. That’s why real Bitcoin is sent in batches. Read the full breakdown.
If you choose a Bitcoin token
cbBTC on Base and WBTC on Arbitrum are sent after every buy, with no batch. At $10 a buy that comes to about 0.55% all in: 0.2% for the swap, 0.25% for Stackk and a 1¢ tip.
Updated
Questions
Is there a minimum buy?
Yes, $5 a buy.
Do I pay anything if a buy doesn’t fill?
No. After 10 minutes the buy is cancelled and the money returns to your vault, fee included.
Can the fee go up?
Not on an existing vault. The fee is fixed in the contract and capped at 0.5%. A change would need a new version that you choose to move to.
Who pays for Sonic gas?
Whoever triggers the buy, usually our keeper. The small tip from your plan covers it.