The short answer
A multi-year deal is worth real money to you (locked revenue, no renewal risk, lower churn) so charge for it properly rather than giving it away. Two structures matter. A ramp lets the customer start small and step up on a schedule, which wins deals where the full price is a stretch today, at the cost of a billing system that has to handle it and a revenue number that gets harder to read. A flat multi-year with a capped annual uplift is simpler and usually better for you. On terms, the things sophisticated buyers ask for are exactly the things you should price: annual prepay versus quarterly, a cap on renewal increases, rollover of unused commitment, pre-agreed rate tables for growth. Give them, but take something each time. In Indian public sector and PSU work the shape is different again, with advance against bank guarantee, milestone payments and an AMC tail, so read the tender document before you quote.