Use current spend as the basis for comparison against the threshold.
ForecastedSpend
Use forecasted spend for the period as the basis for comparison against
the threshold.
FORECASTED_SPEND can only be set when the budget's time period is a
[Filter.calendar_period][google.cloud.billing.budgets.v1beta1.Filter.calendar_period].
It cannot be set in combination with
[Filter.custom_period][google.cloud.billing.budgets.v1beta1.Filter.custom_period].
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eThresholdRule.Types.Basis\u003c/code\u003e enum defines the method used to determine if spending has exceeded a threshold within the Cloud Billing Budget v1beta1 API.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of this API is 2.0.0-beta06, with prior versions including 2.0.0-beta05 and 1.0.0-beta05, each having the same enum.\u003c/p\u003e\n"],["\u003cp\u003eThe available basis options are \u003ccode\u003eCurrentSpend\u003c/code\u003e, which compares against current spending, \u003ccode\u003eForecastedSpend\u003c/code\u003e, which compares against projected spending (only for calendar period budgets), and \u003ccode\u003eUnspecified\u003c/code\u003e for an undefined basis.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eForecastedSpend\u003c/code\u003e can not be used with \u003ccode\u003ecustom_period\u003c/code\u003e, it must be used with \u003ccode\u003ecalendar_period\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
