# RDS Pricing

* **Factors which affect the costs of Amazon RDS include:**\
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  \&#xNAN;**- Clock hours of server time**: For example, from the **time you launch a DB instance until you terminate it.**\
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  \&#xNAN;**-** **Database characteristics**: **Physical capacity of the database.** Database characteristics vary depending on the **database engine, size, and memory class.**\
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  **- Database purchase type**: **On-Demand DB Instances** (more expensive but pay-as-you-go) **or Reserved DB Instances** (cheaper but longer commitment).\
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  \&#xNAN;**-** **Number of database instances**: **Provision multiple DB instances** to handle peak loads.\
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  \&#xNAN;**- Provisioned storage**: **No additional charge for backup storage of up to 100 percent of your provisioned database storage for an active DB Instance.** After the DB Instance is terminated, backup storage is billed per GB per month.\
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  \&#xNAN;**- Additional storage:** Amount of backup storage in addition to the provisioned storage amount is billed per GB per month.\
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  \&#xNAN;**- Requests:** **Number of input and output requests to the database.**\
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  \&#xNAN;**- Deployment type:** **Deploy your DB Instance to a single Availability Zone or multiple Availability Zones.**\
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  \&#xNAN;**- Data transfer: Inbound data transfer is free, and outbound data transfer costs are tiered.**