Dear Alibaba Cloud customer,
To provide you with more accurate insights into cost efficiency, we are updating the calculation logic for the Savings Plan coverage rate. This change will take effect at 00:00 on November 17, 2025.
Key changes
The previous calculation logic did not accurately reflect your Savings Plan coverage when you used a coupon.
Previous logic: The denominator in the formula was the Pay-As-You-Go Payable Amount, the amount payable after applying a coupon. This resulted in a smaller denominator and an inflated coverage rate.
Updated logic: The new logic uses the Pay-As-You-Go Amount After Discount. This amount represents your pay-as-you-go spending before any coupon deductions are applied, providing a more realistic baseline for the spending your Savings Plan covers.
Formula comparison
Previous formula: Coverage Rate = Savings Plan Deduction Amount / (Savings Plan Deduction Amount + Pay-As-You-Go Payable Amount)
New formula (more accurate): Coverage Rate = Savings Plan Deduction Amount / (Savings Plan Deduction Amount + Pay-As-You-Go Amount After Discount)
How this affects you
Metric change: The console now displays a lower Savings Plan coverage rate (including for historical data). This is an expected correction that provides a more accurate metric.
No impact on billing: This change affects the calculation logic only. It does not affect your actual bill, the Savings Plan Deduction Amount, or your overall cost savings.
We are committed to enhancing the transparency and accuracy of our services. If you have any questions or concerns about this adjustment, please submit a ticket.
Thank you for your understanding and support.