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.v1.Filter.calendar_period].
It cannot be set in combination with
[Filter.custom_period][google.cloud.billing.budgets.v1.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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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 webpage provides documentation for the \u003ccode\u003eThresholdRule.Types.Basis\u003c/code\u003e enum within the Google Cloud Billing Budget v1 API.\u003c/p\u003e\n"],["\u003cp\u003eThis enum defines the basis for determining if spending has exceeded a threshold, with options including \u003ccode\u003eCurrentSpend\u003c/code\u003e, \u003ccode\u003eForecastedSpend\u003c/code\u003e, and \u003ccode\u003eUnspecified\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eCurrentSpend\u003c/code\u003e is used when comparing the actual spend against the threshold while \u003ccode\u003eForecastedSpend\u003c/code\u003e utilizes projected spending, and it can only be used with calendar-based budget periods.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eUnspecified\u003c/code\u003e option represents a threshold basis that has not been defined.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation is available in multiple versions, with version 2.6.0 being the latest release.\u003c/p\u003e\n"]]],[],null,[]]
