Whether funding is a cost or credit depends on two inputs together: the funding-rate sign and whether your position is long or short. Under Binance's documented convention, a positive rate means longs pay shorts, while a negative rate means shorts pay longs. The funding fee calculator displays a positive amount for an estimated long-side cost and a negative amount for an estimated receipt; read the sign together with its selected side.
Use a two-by-two check
First identify the rate sign shown for the specific perpetual contract. Then identify whether your position is long or short at the funding event. In the standard convention documented by Binance, the combinations are:
| Rate | Long position | Short position |
|---|---|---|
| Positive | Pays funding | Receives funding |
| Negative | Receives funding | Pays funding |
The calculator's sign is an amount convention, not a universal display standard. Its fundingEstimate function multiplies notional by the entered rate percent, number of events, and a direction factor: +1 for long and −1 for short. So a positive output represents a cost in the tool, while a negative output represents an estimated credit. A different platform may label cash flows differently; verify its own sign and history fields before reconciling a transaction.
Funding is based on position value in the simplified calculator, not on the margin deposit. Leverage matters indirectly because it can change how much notional you choose to hold. At the same notional and same rate, changing the leverage input elsewhere does not multiply this funding calculation.
Worked example: same rate, opposite sides
Assume a constant $10,000 notional position, a +0.02% rate at each counted event, and three events. The per-event amount is:
$10,000 × 0.02 ÷ 100 = $2.00
For a long, the estimate is $2 × 3 × 1 = $6.00. In the calculator, that positive amount means an estimated $6 cost. For a short at the same notional and rate, the direction factor is −1, so the result is −$6.00, which means an estimated $6 receipt under the tool's convention.
If the rate instead is −0.02%, the signs reverse. The long's estimate becomes −$6.00 (estimated receipt), and the short's becomes +$6.00 (estimated cost). The arithmetic follows the rate and direction inputs; it does not predict whether the rate will stay at that value for three settlements.
The calculator counts events as floor(holding hours ÷ interval hours). For 24 hours and an 8-hour interval it counts three events. A real venue applies funding according to its contract schedule and whether a position is open at the relevant time. Binance's support page describes its own funding times, rate mechanics, and caveats, including that intervals can be adjusted. Those details are Binance-specific; check the contract information for your venue and symbol. Binance's funding-rate FAQ explains its payment direction and schedule.
Keep costs and receipts in perspective
A funding credit does not make a position profitable by itself. Price movement, entry and exit fees, and slippage can outweigh a receipt. Likewise, a funding debit does not tell you whether the trade's total PnL is negative; the underlying position could have a larger unrealized gain or loss. Use the futures PnL calculator to model price change, fees, and funding together when its assumptions fit your contract.
Do not multiply the rate by your margin balance. If your position has $10,000 notional and $2,000 initial margin, a 0.02% rate gives a $2 estimated event amount on $10,000 notional in this simple example, not $0.40 on the margin. The resulting payment is 0.1% of the $2,000 margin, which helps explain why a small rate can feel larger on a highly leveraged position. The payment formula still starts from notional.
For a multi-event estimate, the calculator holds notional and rate constant. If either changes, split the hold into separate scenarios or calculate each event with the rate and approximate position value you expect. A dashboard's current rate may update before the settlement, and a displayed rate may be an estimate. The funding rates page can help compare current rate displays, but use the exchange's contract page and transaction history to confirm what actually settled.
Common mistakes
- Interpreting a positive rate without checking whether you are long or short.
- Assuming a negative amount in this calculator is a fee owed; it indicates a modeled receipt under the tool's convention.
- Applying the percentage to margin instead of position notional.
- Treating one current rate as fixed across every future settlement.
- Assuming the calculator's elapsed-hours event count matches a venue's wall-clock funding schedule.
- Calling a funding credit “profit” without subtracting trading fees and accounting for price movement.
FAQ
Does positive funding mean I pay?
If you are long, Binance's documented convention says a positive rate means the long pays the short. If you are short, the direction is reversed and you receive. Check the convention and event record on the platform you use.
Why does the calculator show a negative funding amount?
The tool uses positive values for estimated costs and negative values for estimated receipts. For a short at a positive rate, a negative amount represents a modeled receipt. The sign is the calculator's display convention.
Is funding charged on margin or notional?
This calculator estimates funding as notional multiplied by the rate and event count. Actual contract valuation rules are venue-specific, but do not substitute your margin deposit for notional in this tool.
Can the funding direction change while I hold?
Yes. The rate can change sign between events. A multi-event estimate using a single input rate cannot represent a sign change; model the intervals separately and confirm completed payments in your exchange history.
This guide is for educational purposes only and is not financial advice.