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"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-04 UTC."],[[["Version 2.5.0 of the Google Cloud Billing Budgets v1 API is documented, and the latest version available is 2.6.0."],["The documented `ThresholdRule.Types.Basis` enum defines the basis for determining if spending has passed a set threshold."],["The `ThresholdRule.Types.Basis` enum supports three fields: `CurrentSpend`, `ForecastedSpend`, and `Unspecified`."],["`CurrentSpend` uses current spending to compare against the threshold, while `ForecastedSpend` uses the forecasted spending, and `Unspecified` is the default."],["The `ForecastedSpend` basis is only compatible with a calendar period and not with custom periods defined by `Filter.custom_period`."]]],[]]
