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docs.aws.amazon.com › aws billing and cost management › user guide › consolidating billing for aws organizations › reserved instances
Reserved Instances - AWS Billing
For billing purposes, the consolidated billing feature of AWS Organizations treats all the accounts in the organization as one account. This means that all accounts in the organization can receive the hourly cost benefit of Reserved Instances that are purchased by any other account.
Videos
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AWS Reserved Instances Explained - YouTube
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How do I purchase an Amazon EC2 Reserved Instance? - YouTube
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How can I modify the terms of my EC2 Reserved Instance? - YouTube
03:10
How do I purchase an Amazon EC2 Reserved Instance?
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What are the differences between Standard and Convertible Amazon ...
I thought I understood Reserved Instances but clearly not - halp!
Reservations, like savings plans, are a billing abstraction. In this case, you are committing to pay for a specific instance size, in a specific instance family, in an AZ or Region, in exchange for a discount. You do not have any assurance that you will actually be able to spin up that kind of instance however. Reservations also have some amount of flexibility, but upwards. For example, if you purchase 2 m3.large reservations, they will primarily apply to 2 running m3.large instances. If none are running, it will try to apply against a running m3.xlarge instance. Reservations are more limiting than savings plans and I would personally preference savings plans for their flexibility. More on reddit.com
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October 7, 2024Is it not possible to buy t4g reserved instances for RDS?
I've got 3 more months on my t2.medium reservation and would love to switch to t4g for the next 3 years. Any chance this will happen soon u/jeffbarr ? More on reddit.com
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June 22, 2021AWS OpenSearch Service - Buy/Sell Reserved Instances
Your best bet would be to reach out to AWS, they don’t seem to have opensearch listed under sellable or exchangeable RIs. More on reddit.com
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September 19, 2021AWS promotional credits for Reserved Instances
There are some billing-related Frequently Asked Questions in our wiki, however to resolve billing issues, please contact Customer Service directly.
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February 17, 2020AWS
aws.amazon.com › amazon ec2 › pricing › reserved instances
Reserved Instances - Amazon EC2 Reserved Instances - AWS
2 days ago - Then this RI’s discounted rate can automatically apply to two m4.xlarge instances in us-east-1a or four m4.large instances in us-east-1b. ... Offering class: There are two classes of RIs: Convertible and Standard. Convertible RIs can be exchanged for different Convertible RIs of equal or greater value. Term: AWS offers Standard RIs for 1-year or 3-year terms. Reserved Instance Marketplace sellers also offer RIs often with shorter terms.
Amazon Web Services
docs.aws.amazon.com › amazon ec2 › user guide › amazon ec2 instances › amazon ec2 billing and purchasing options › reserved instances for amazon ec2 overview › buy reserved instances for amazon ec2
Buy Reserved Instances for Amazon EC2 - AWS Documentation
Purchase Amazon EC2 Reserved Instances from third party sellers or AWS using the Amazon EC2 console, a command line tool, or an AWS SDK.
Amazon EC2
instances.vantage.sh
Amazon EC2 Instance Comparison
Reserved/Savings Plan1-year - No Upfront · CurrencyUnited States Dollar ($) ColumnsColumns · CompareClear Filters · Export · Updated 12/20/2025, 8:14:07 AM · EC2Instances.info - Easy Amazon EC2 Instance Comparison ·
Amazon Web Services
docs.aws.amazon.com › amazon ec2 › user guide › amazon ec2 instances › amazon ec2 billing and purchasing options › reserved instances for amazon ec2 overview
Reserved Instances for Amazon EC2 overview - Amazon Elastic Compute Cloud
Reserved Instances provide you with significant savings on your Amazon EC2 costs compared to On-Demand Instance pricing. Reserved Instances are not physical instances, but rather a billing discount applied to the use of On-Demand Instances in your account.
Umbrella
umbrellacost.com › home › ec2 reserved instance: everything you need to know
EC2 Reserved Instance: Everything You Need to Know - Umbrella
July 29, 2025 - An Amazon EC2 Reserved Instance (RI) is one of the most powerful cost savings tools available on AWS.
Amazon Web Services
docs.aws.amazon.com › amazon ec2 › user guide › amazon ec2 instances › amazon ec2 billing and purchasing options › reserved instances for amazon ec2 overview › how billing works with reserved instances
How billing works with Reserved Instances - Amazon Elastic Compute Cloud
For information, see AWS Free Tier ... Reserved Instances are billed for every clock-hour during the term that you select, regardless of whether an instance is running. Each clock-hour starts on the hour (zero minutes and zero seconds past the hour) of a standard 24-hour clock.
Stripe
stripe.com › blog › aws-reserved-instances
Effectively using AWS Reserved Instances
June 26, 2018 - This elasticity enables us to reliably serve a rapidly growing user base and scale along with their businesses. We use AWS Reserved Instances, which allow us to predictably forecast our cloud spend given a dynamic fleet with rapidly changing compute requirements.
Amazon Web Services
aws.amazon.com › cloud financial management › cost optimization with aws › reserved instances
Reserved Instances
4 days ago - You can make rightsizing a smooth ... ... Amazon EC2 Reserved Instances (RI) provide a significant discount (up to 75%) compared to On-Demand pricing and provide a capacity reservation when used in a specific Availability Zone....
AWS re:Post
repost.aws › knowledge-center › ec2-ri-basics
Learn about EC2 Reserved Instances | AWS re:Post
June 9, 2022 - Regional RIs apply a discount to On-Demand Instances you run in a particular Region. Zonal Reserved Instances allow you to create a capacity reservation for an instance type within a specific Availability Zone.
Densify
densify.com › home › what are amazon reserved instances?
What are Amazon Reserved Instances?
April 13, 2023 - RIs are a reservation of resources and capacity—not a physical instance type—and manifest as a billing discount or coupon applied against On-Demand instance use in an AWS account.
nOps
nops.io › blog › the-ultimate-guide-to-aws-reserved-instances
The Ultimate Guide to AWS Reserved Instances | nOps
May 27, 2025 - When you reserve an instance, you commit to paying for a specific amount of computing capacity in advance for a period of one or three years. By committing to using these resources for a longer period, AWS can offer a significant discount compared ...
Harness
harness.io › harness devops academy (glossary) › what are aws reserved instances?
What are AWS Reserved Instances?
November 5, 2025 - Reserved Instances provide users with a way to optimize their AWS costs by offering a lower hourly rate compared to on-demand instances. The pricing is based on the term length (1 or 3 years), payment option (all upfront, partial upfront, or ...
Amazon Web Services
pages.awscloud.com › rs › 112-TZM-766 › images › eBook_The Ultimate Guide to Amazon EC2 Reserved Instances.pdf pdf
The Ultimate Guide to Amazon EC2 Reserved Instances
Amazon EC2 Instances are priced in three ways: On-Demand, where you · pay full price; Spot, where your price is determined by market availability; and Reserved, where you receive a discount based on a commitment to
TechTarget
techtarget.com › searchaws › definition › AWS-Reserved-Instances-Amazon-Reserved-Instances
What are AWS Reserved Instances? | Definition from TechTarget
AWS Reserved Instances (RIs) refer to compute capacity that can be reserved on Amazon Elastic Compute Cloud (Amazon EC2) and Amazon Relational Database Service (Amazon RDS) to take advantage of discounted pricing.
Reddit
reddit.com › r/aws › i thought i understood reserved instances but clearly not - halp!
r/aws on Reddit: I thought I understood Reserved Instances but clearly not - halp!
October 7, 2024 -
Hi all, bit of an AWS noob. I have my Foundational Cloud Practitioner exam coming up on Friday and while I'm consistently passing mocks I'm trying to cover all my bases.
While I feel pretty clear on savings plans (committing to a minimum $/hr spend over the life of the contract, regardless of whether resources are used or not), I'm struggling with what exactly reserved instances are.
Initially, I thought they were capacity reservations (I reserve this much compute power over the course of the contracts life and barring an outage it's always available to me, but I also pay for it regardless of whether I use it. In exchange for the predictability I get a discount).
But, it seems like that's not it, as that's only available if you specify an AZ, which you don't have to. So say I don't specify an AZ - what exactly am I reserving, and how "reserved" is it really?
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Reservations, like savings plans, are a billing abstraction. In this case, you are committing to pay for a specific instance size, in a specific instance family, in an AZ or Region, in exchange for a discount. You do not have any assurance that you will actually be able to spin up that kind of instance however. Reservations also have some amount of flexibility, but upwards. For example, if you purchase 2 m3.large reservations, they will primarily apply to 2 running m3.large instances. If none are running, it will try to apply against a running m3.xlarge instance. Reservations are more limiting than savings plans and I would personally preference savings plans for their flexibility.
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Finout
finout.io › blog › aws-reserved-instances-pros-cons-types-use-cases
AWS Reserved Instances: Pros/Cons, Types & Use Cases
May 20, 2025 - Reserving an instance involves choosing a term (one or three years), instance type, and payment options. These decisions determine the upfront payment required and overall cost savings. This is part of a series of articles about AWS cost management.
Amazon Web Services
docs.aws.amazon.com › amazon ec2 › user guide › amazon ec2 instances › amazon ec2 billing and purchasing options › reserved instances for amazon ec2 overview › how reserved instance discounts are applied
How Reserved Instance discounts are applied - Amazon Elastic Compute Cloud
If the regional Reserved Instance owned by account A was first applied to the usage in account A, the zonal Reserved Instance owned by account C remains unused and usage in account B is charged at On-Demand rates. For more information, see Understanding your reservations in the AWS Cost and ...
Amazon Web Services
docs.aws.amazon.com › amazon ec2 › user guide › amazon ec2 instances › amazon ec2 billing and purchasing options › reserved instances for amazon ec2 overview › types of reserved instances (offering classes)
Types of Reserved Instances (offering classes) - Amazon Elastic Compute Cloud
The configuration of a Reserved Instance comprises a single instance type, platform, scope, and tenancy over a term.