Can some experts please guide me if there are any interest or any other costs to hold a Future Position.
Example -
I buy 1 ES on Jan 1 and sell that on Feb 1 , will my broker charge me any interest (Like we pay when we short stock) since I only invested around 5K for this OR will I just pay commissions and nothing else?
I am using IB.
Taking your question at face value, and assuming nothing but a futures contract with no options or other hedging, and not considering contract expirations, then the only response here that matters is what Old Man Morse posted. You pay nothing but commissions/fees on the entry and exit.
There is one sticky bit however. As of this timestamp, the margin requirement to hold a long-term (overnight) contract in ES is $5,225 per CME guidelines. Assuming that was the same requirement for your contract month at the time, your position would be liquidated if your 5K account cash plus value of contract at time of daily market settlement was not greater than $5,225.
Ergo, at the market close, if your contract was down $100, your NLV would be $4,900. That does not meet the $5,225 threshold, so you would lose $100 from your account when your position is liquidated. If your contract was up $100, your NLV would be $5,100. That does not meet the $5,225 threshold, so you would gain $100 in your account when the position is liquidated.
If your contract was up $500 at market close, your NLV would be $5,500, so you meet the $5,225 threshold. Your position would not be liquidated.
Granted, your particular broker would be able to give you the true details about this very scenario, for they may have different risk requirements above and beyond the CME guidelines. So the best bet to get to the truth would be to call your broker (in this case IB) and just ask them.