Bottom line: lending-bot fees come in three main shapes — subscription (fixed monthly fee), profit-share (a cut of what you earn), and tiered fee + overage cut. Which one is cheaper for you depends on two things: how big your capital is, and whether the market is hot or cold. For the same interest earned, subscription and cut-based fees can cost very differently. This guide shows how to compare — don't judge by "how much per month" alone.
The three lending-bot fee models
- Subscription (fixed monthly fee): you pay a fixed fee regardless of how much you earn. EarnUSD uses this model.
- Profit-share: a percentage is taken from the interest you earn. Coinlend (Coinlend GmbH, Germany) uses a profit-share model.
- Tiered fee + overage cut: a base fee, plus a cut on returns above a threshold. Altinvest uses a tiered fee with an overage cut.
Pros and cons of each
Subscription (fixed monthly fee)
Pro: cost is fixed and predictable; the more you earn, the lower the fee as a share — best for larger capital and higher returns (the fee gets diluted). Con: with very small capital, a fixed monthly fee can be a high share of your returns.
Profit-share / overage cut
Pro: if you don't earn, you (almost) don't pay — low pressure for small capital or low-yield bear markets. Con: the more you earn, the more is taken; with large capital in a hot market, the absolute cut can far exceed a fixed monthly fee — large holders lose out.
Which is cheaper for you? A simple test
| Your situation | Cheaper model | Why |
|---|---|---|
| Large capital, high returns | Subscription | Fixed fee diluted, low share of returns |
| Small capital, just starting | Profit-share/overage or low monthly | You pay little when you earn little |
| Hot market, high rates | Subscription | A cut scales up with high returns |
| Cold market, low returns | Compare absolute amounts | Low monthly vs low cut — see which actually costs less |
The core idea: compare fees as "a percentage of your annualized return," not just the "monthly number" or the "cut %." A seemingly cheap low monthly fee can be a high share for small capital; a seemingly small profit-share can be a lot of money for a large holder.
Don't overlook these when comparing fees
- Is there a free trial? Most services offer 7–14 days — test before you commit.
- What happens in a bear market? When rates crash, profit-share/cut services' revenue drops sharply, which can affect whether they survive; fixed subscriptions have steadier cash flow (this also ties to whether a service shuts down — see how to choose one that lasts).
- Value beyond fees: how fast it grabs high rates, which currencies it supports, whether it's non-custodial — all affect "how much actual return the same fee buys you."
EarnUSD's fees
EarnUSD uses a subscription (fixed monthly fee): it takes no cut of your interest — whatever you earn is yours, and the fee is fixed and predictable. Best for those with some scale who want transparent costs. For the actual fee and estimates across different capital sizes, see the pricing page. Non-custodial (a lend-only, no-withdrawal API; principal stays in your own Bitfinex account), supports USD/USDT/BTC, auto-grabs high rates every minute.
Conclusion
There's no single best answer to "how lending bots charge" — subscription suits large capital, high returns, and a desire for predictable cost; profit-share/cut suits small capital or low-yield periods. When comparing, convert fees into "a % of annualized return," then weigh the trial experience, bear-market resilience, and rate-grabbing ability together, so you're not misled by the "monthly number" alone.