# Investment
<a name="API_billing_Investment"></a>

An investment within an investment summary. This is a union in which exactly one member is set. The `milestoneBasedInvestment` member represents a fixed, scheduled investment. The `outcomeBasedInvestment` member represents an attestable investment awarded upon completion of a defined outcome. Check which member is present to determine the investment type.

## Contents
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**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** milestoneBasedInvestment **   <a name="awscostmanagement-Type-billing_Investment-milestoneBasedInvestment"></a>
An investment with a fixed value that is disbursed on a schedule. This member is set for a milestone-based investment and corresponds to the `MILESTONE_BASED` investment type.  
Type: [MilestoneBasedInvestment](API_billing_MilestoneBasedInvestment.md) object  
Required: No

 ** outcomeBasedInvestment **   <a name="awscostmanagement-Type-billing_Investment-outcomeBasedInvestment"></a>
An investment that is awarded upon completion of a defined outcome. This member is set for an outcome-based (attestable) investment and corresponds to the `OUTCOME_BASED` investment type.  
Type: [OutcomeBasedInvestment](API_billing_OutcomeBasedInvestment.md) object  
Required: No

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/billing-2023-09-07/Investment) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/billing-2023-09-07/Investment) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/billing-2023-09-07/Investment)