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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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\u003eThis document describes the \u003ccode\u003eBasis\u003c/code\u003e enum within the \u003ccode\u003eGoogle.Cloud.Billing.Budgets.V1Beta1\u003c/code\u003e namespace, which is used to define the basis for determining if spending has exceeded a threshold.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eBasis\u003c/code\u003e enum has three possible values: \u003ccode\u003eCurrentSpend\u003c/code\u003e, which uses current spending; \u003ccode\u003eForecastedSpend\u003c/code\u003e, which uses forecasted spending; and \u003ccode\u003eUnspecified\u003c/code\u003e, for an unspecified basis.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eForecastedSpend\u003c/code\u003e can only be utilized when the budget's time period is a calendar period and not a custom period.\u003c/p\u003e\n"],["\u003cp\u003eThe document provides a link to the latest version of the documentation, 2.0.0-beta06, as well as previous versions, including 2.0.0-beta05 and 1.0.0-beta05.\u003c/p\u003e\n"]]],[],null,[]]