# SubscriptionUpdatePreview **credit**integer\required Unused time that would be credited at the current price, in the smallest currency unit. **Example: **`500` **charge**integer\required Time that would be charged at the new price, in the smallest currency unit. An interval change charges the full new price rather than a fraction of it. **Example: **`1200` **net**integer\required The computed difference, `charge` minus `credit`. This is the amount that would move, except when `refundCapped` is true: a refund cannot exceed what the payment funding the current period received, so less than `net` would be refunded. **Example: **`700` **direction**stringrequired Whether the difference would be charged, refunded, or neither. `none` means the difference rounds to zero and no money moves. **Possible values:** \[`charge`, `refund`, `none`] **Example: **`charge` **refundCapped**booleanrequired True when the refund would be smaller than the magnitude of `net`, because a refund cannot exceed the amount the payment funding the current period received. **Example: **`false` **effectiveAt**integer\required The date the change would take effect. **Example: **`1636366897` **currentPeriodEnd**number\required The end date of the current subscription period. Measured in seconds since the Unix epoch. **Example: **`1636366897` **newPeriodEnd**integer\ The end of the billing period the change would start. Present only for an `interval` or `intervalCount` change, which restarts the period. **Example: **`1667902897` **nextPaymentAt**integer\ When the next payment would be taken. Present only for an `interval` or `intervalCount` change. **Example: **`1667902897` SubscriptionUpdatePreview ``` { "credit": 500, "charge": 1200, "net": 700, "direction": "charge", "refundCapped": false, "effectiveAt": 1636366897, "currentPeriodEnd": 1636366897, "newPeriodEnd": 1667902897, "nextPaymentAt": 1667902897 } ```