URD PURCHASE RCM APPLICABILITY

IS URD RCM APPLICABLE WHEN GOODS PURCHASE EXCEEDING RS. 5000/-, BUT PAYMENT MADE IN DIFFERENT DATE???. LET SAY SECOND HAND BIKE PURCHASE OF RS. 20000/- FOR OFFICE USE AND PAYMENT FOR THE SAME HAS BEEN MADE OF RS. 4000/- FIVE TIME ON DIFFERENT DATES. SHOUL I CONSIDER PURCHASE WORTH EXCEEDING RS. 5000/- OR THE PAYMENT EXCEEDING RS. 5000/-??????