The Funding Rate Tax

There's a category of trading cost that doesn't show up anywhere in your trade history, and most retail futures traders dramatically underestimate it: funding.

If you trade perpetual futures — the standard format on every major crypto derivatives exchange — every position you hold has a funding payment attached. Every 8 hours, longs and shorts pay each other based on the prevailing funding rate. Three payments per day, every day, on every open position.

A reasonable baseline rate is around 0.01% per 8-hour period in a normal market. That works out to about 0.03% per day. On a $50,000 perpetual long held for a single month in positive funding, that's roughly $450 in cumulative funding cost — paid in 90 separate, individually invisible deductions from your balance.

Here's where it gets interesting. In trending markets, funding rates climb sharply. 0.05% per 8 hours is not unusual during strong directional moves. On the same $50,000 position, that's $75 per day, or $525 per week, just to keep the trade open. For shorter-term traders, holding through high funding can turn a profitable thesis into a break-even trade. For longer-term holders, it can quietly compound into a significant cost over months.

None of this is hidden — funding rates are published openly on every exchange's contract page. But it's published as an abstract number ("0.0095%") that's easy to ignore until it's already happened. The fix is mechanical: check funding before you size, factor it into your expected cost basis, and reduce position size when rates are extreme. It's the same mental model you'd apply to any other cost-of-carry instrument.

Trading involves risk; funding awareness is one variable, not a guarantee of anything else.

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