Savings vary by service, region, and commitment length, but Reservations commonly offer meaningful double-digit percentage savings compared to pay-as-you-go pricing for the same resource, with 3-year commitments generally discounting more than 1-year commitments.
Rather than relying on a general estimate, the most useful approach is to have your actual usage analyzed — a CSP partner can typically show you a specific projected savings number based on your real workload history rather than a rule of thumb.
Want to know your actual potential savings from Reservations based on your real Azure usage? We can run that analysis for you.