Stamp duty is generally dealt with around completion, rather than when you first agree the sale or sign contracts. Your solicitor or conveyancer will usually calculate the amount, arrange payment and file the stamp duty return after the deed is executed, often as part of the closing process. Revenue’s filing and payment deadline is commonly 44 days from execution, but the current rules and any exceptions should be confirmed on revenue.ie. Make sure the funds are available and ask your solicitor when payment will be required in your particular transaction.