All Products
Search
Document Center

PolarDB:Modify configurations

Last Updated:Jul 24, 2026

Fees for modifying pay-as-you-go instances

Pay-as-you-go instances are billed hourly. After you modify the configuration, the instance is billed at the new hourly rate.

Fees for modifying subscription instances

Modifying a subscription instance results in a supplemental payment or a refund.

  • Upgrade: Select Upgrade Now. You must pay the price difference for the new specifications.

  • Downgrade: Select Downgrade Now. You will receive a refund for the price difference for the new specifications.

Modification type

Fee details

Upgrade Now

Payment amount = (Monthly price of new configuration / 30 / 24 × Remaining subscription duration in hours) - (Monthly price of old configuration / 30 / 24 × Remaining subscription duration in hours)

Example: The monthly price of the new configuration is USD 14,400, and the monthly price of the old configuration is USD 7,200. The remaining subscription duration is 50 days. The payment amount is (14,400 / 30 / 24 × 50 × 24) - (7,200 / 30 / 24 × 50 × 24) = USD 12,000.

Downgrade Now

Refund amount = (Monthly price of old configuration / 30 / 24 × Remaining subscription duration in hours) - (Monthly price of new configuration / 30 / 24 × Remaining subscription duration in hours)

Example: The fee for the current configuration for 3 months is USD 3,500. After applying a coupon, the actual amount paid is USD 3,000. After two months of use, the value of the remaining duration is USD 1,000. The price of the new configuration for one month is USD 800. The refund amount is 1,000 - 800 = USD 200.

Pricing

The price of an instance depends on the selected region, specifications, storage, and other configurations. For more information, see the purchase page.