Spot vs Perpetual Futures: What Changes When You Trade Perps Instead of Spot

Spot trading is the exchange of a cryptocurrency for cash or another coin at the current market price, with the asset delivered to your account as soon as the order fills. A perpetual futures contract is a derivative that tracks that same price without ever expiring, held with margin instead of the coin itself and kept in line with spot by a periodic funding payment between longs and shorts. Same chart, different instrument, and the differences decide what a position can cost you.

What is the difference between spot and perpetual futures?

On spot, you own the thing. Buy one bitcoin and there's one bitcoin in your account: you can withdraw it to a hardware wallet, stake it if the chain allows, or leave it alone for a decade. Your exposure is one to one with price. The most you can lose is what you paid, there's no clock running, and nobody can close the position for you. Short exposure isn't native. You'd have to borrow the coin and sell it, which is a separate margin product most spot traders never touch.

On a perpetual, you hold a contract, not a coin. The contract pays you the difference between your entry and the current price, and you post margin as collateral for that promise. Because the exchange only needs enough collateral to cover plausible moves, you can control a position many times larger than your margin, and you can be short as easily as long. The trade-off is that the exchange can and will close the position when your margin runs low, and holding it carries a running cost called funding.

Perpetuals were popularized by BitMEX in 2016 and have since become the dominant instrument in crypto. On most days, perpetual volume across centralized and on-chain venues runs several times spot volume, and for many altcoins the perp is the most liquid market that exists.

What is a perpetual futures contract?

A traditional futures contract has an expiry date. On that date the futures price and the spot price must meet, which is what keeps them close in the weeks before. A perpetual removes the expiry, so it needs a different anchor. That anchor is funding: a payment exchanged between longs and shorts at fixed intervals, sized to the gap between the perp price and a spot index. On Binance and most large venues the interval is 8 hours, paid at 00:00, 08:00 and 16:00 UTC.^[1] Some venues run shorter intervals for volatile pairs, and Hyperliquid pays funding every hour at one eighth of the 8-hour rate.^[2]

Two prices matter on a perp, and confusing them is expensive. The last price is where the contract most recently traded. The mark price is a blend of the spot index and the funding premium, and it's what the exchange uses to calculate unrealized profit and, more importantly, liquidation. A brief wick on the perp's own order book won't liquidate you if the mark price didn't reach your level. A move in the spot index will.

Most perps today are linear contracts, quoted and settled in a stablecoin such as USDT or USDC. Inverse contracts, settled in the coin itself, still exist for BTC and ETH and behave a little differently because the collateral moves with the price you're trading.

How does leverage change the trade?

Leverage is the ratio of the position's notional value to the margin backing it. With $1,000 of margin at 10x, you control $10,000 of exposure. A 5% move in your favor is a 50% gain on margin. A 5% move against you is a 50% loss. The chart didn't get more volatile. Your account did.

Exchanges offer up to 100x or more on major pairs, but the number on the slider isn't the point. What matters is how far price can move before the position is closed, and how much of the account is at risk at that point. The leverage calculator works this forward from margin, entry and leverage so you can see the notional, the gain or loss per percentage move and the distance to liquidation before opening anything. Our guide to position sizing makes the case that leverage should fall out of the stop distance and the risk budget, not be chosen first.

Margin mode matters too. Isolated margin caps the loss at the margin assigned to that one position. Cross margin lets a losing position draw on the whole account balance, which delays liquidation but puts everything else on the line.

Where does a perp get liquidated?

Liquidation is the exchange closing your position because the margin can no longer cover the maintenance requirement. The rough formula for a long is the entry price multiplied by one minus one over the leverage, plus the maintenance margin rate. At 10x on a $100,000 entry with a 0.5% maintenance rate, that's about $90,500, a 9.5% drop. At 20x it's about $95,500. At 50x it's $98,500, a move that bitcoin makes on an ordinary Tuesday.

When liquidation triggers, the exchange takes over the position and closes it at market, usually charging a liquidation fee on top. On isolated margin, the margin is gone and that's the end of it. Crypto exchanges run insurance funds and auto-deleveraging so that traders don't end up owing more than they deposited, which is why perp losses are capped at the collateral rather than open-ended as in some traditional markets.

The liquidation calculator gives the exact level for a given entry, leverage, margin mode and maintenance rate. Liquidations also matter beyond your own account. Clusters of liquidation levels are where forced selling or forced buying gets triggered, and a run through them produces the cascades that define crypto's sharpest moves. The liquidations as a signal guide covers how to read them.

What does funding cost?

Funding is paid on the notional value of the position, not on the margin. That single fact is what makes it expensive at leverage. The payment moves directly between longs and shorts; the exchange facilitates the transfer without taking a cut.^[3] When the rate is positive, longs pay shorts. When it's negative, shorts pay longs. Holding a position at the funding timestamp is what triggers the payment. Close a minute before and you owe nothing for that interval.

A rate of 0.01% per 8 hours is the neutral baseline on most venues. On $10,000 of notional that's $1 per interval, $3 a day, about 11% a year. In a hot market BTC funding runs 0.05% to 0.1% per 8 hours, which is $15 to $30 a day on the same notional, or 55% to 110% annualized. If that $10,000 position is backed by $1,000 of margin at 10x, a month of 0.05% funding costs about $450, nearly half the margin, with no move in price required. Funding on smaller altcoins spikes far higher during squeezes.

The funding cost calculator turns a rate, a notional and a holding period into a dollar figure and an annualized cost. It's the step most new perp traders skip, and it's the reason a correct directional call can still lose money on a position held for weeks.

Funding cuts both ways. The side being paid earns it, and the classic cash-and-carry structure, long spot against a short perp of the same size, exists to collect positive funding with no net price exposure. Dated futures express the same premium as a basis instead of a rolling payment, and the futures basis guide explains that version.

Spot vs perps side by side

Which one for whom?

The instrument should match the job, and most people are doing more than one job.

If the plan is to hold for months or years, spot is the answer. There's no funding drag, no liquidation level, and the coins can leave the exchange for a wallet you control. The same goes for anyone who wants to stake or use the asset on-chain. You can't stake a perp.

If the goal is short exposure, a perp is the natural instrument. Borrowing to short on spot is clunky and often unavailable for smaller coins. Holders who want to protect a spot position through an event without selling it, whether for tax reasons or conviction, do it with a short perp of matching size. The result is a hedge whose cost is the funding rate.

If the aim is capital efficiency over days or a few weeks, perps deliver it, provided the liquidation distance and the funding bill are worked out in advance. At modest leverage with a liquidation level far outside the expected range, a perp behaves like a cheaper spot position. At high leverage, it behaves like a lottery ticket with a running fee.

And if you don't want to watch the screen, spot wins by default. A perp needs a stop, a funding check and an eye on the mark price. A spot position needs nothing.

What perp data says about the market

Perpetuals are where crypto's leverage lives, which makes them the best window into crowding. Funding shows which side is paying to stay in. Open interest shows how much leverage is committed in total, and a rise in open interest alongside a stalling price is a market loading up for a flush. The long/short ratio shows how retail accounts are positioned relative to the whole book. Read together, and alongside the funding rates guide, they tell you whether the next liquidation cascade is more likely to hit longs or shorts. That's intelligence about the market, and it's available whether or not you ever trade a perp yourself.