Savings

Every Reserved Instance is the same bet: pay now, save later.

Term length and payment option decide how big the discount is. They also decide how much cash you pay upfront. Break-even shows when that cash comes back. The math pays off for one reservation or a thousand.

8 min read·Guides·Reviewed Oct 29, 2026

Two levers, one price

Term and payment option set the discount.

Two choices at purchase set a Reserved Instance's discount. A longer term buys a deeper discount for more commitment. Paying more upfront buys a deeper discount for more cash now. The instance stays the same either way.

Payment option: how much you pay now

No Upfront 32–34% at 1 year, 48–53% at 3 yearsYou pay nothing at purchase. The discount comes as a lower hourly rate for the whole term. It is the smallest discount and the easiest to approve. AWS sells no 3-year No Upfront term for Amazon RDS.

Partial Upfront 35–37% at 1 year, 52–57% at 3 yearsYou pay part at purchase and a lower hourly rate for the rest of the term. It sits between cash outlay and discount depth.

All Upfront 36–38% at 1 year, 55–59% at 3 yearsYou pay the full commitment on day one. The hourly rate then drops to $0. It gives the deepest discount, in return for paying it all now.

Figures are medians from the AWS price list in our dataset, as of Aug 20, 2026. Each range runs across Amazon RDS, ElastiCache, and EC2. Your rate depends on instance class and region. See The RI Discount Index for every cell.

Term: how long you commit

1-year 32–38%You commit for one year. Pick it when an instance family might resize, move, or retire within the term.

3-year 48–59%You commit for three years. It gives the deepest discount. It pays off when a family has years of history in the fleet and will keep running.

Term moves the discount more than payment option does. At Partial Upfront, going from 1 to 3 years adds about19 points. Going from No Upfront to All Upfront at 1 year adds about4.

Reading break-even

Break-even is the day the upfront cost has paid for itself.

A reservation with cash paid upfront starts the term behind. That cash could have paid on-demand rates instead. Break-even is the day your avoided on-demand cost catches up to what you paid. Every day after that is savings.

Cumulative cost: on-demand against an All Upfront reservationOne real offer: db.r6g.xlarge, MySQL, Multi-AZ, us-east-1, 1-year All Upfront. These are AWS's published prices as of Aug 20, 2026.

On this offer, the upfront payment breaks even around day197 of the term. The remaining168days are savings. Over the full term that is an effective46% discount. No Upfront and Partial Upfront reservations need less cash at purchase, at a shallower discount. See the db.r6g.xlarge price page for every offer and region.

The multiplier

A small fixed fee can prevent a much larger loss.

The math above is per reservation. Run it across a fleet and the gap grows. Reserver costs a small, fixed amount. A wrong term, a wrong payment option, or a missed renewal costs far more.

$10,530Startup fleet, Watch planSaved each year. The plan is free. One renewal missed by 14 days costs $92. On Watch, catching it costs nothing.

$105,300Growth fleet, Autopilot planSaved each year. The plan is $1,788 a year. One renewal missed by 14 days costs $951. A single prevented miss pays for about 6 months of Autopilot.

$1,053,000Enterprise fleet, Scale planSaved each year. The plan is $5,988 a year. One renewal missed by 14 days costs $6,904. A single prevented miss pays for a year or more of Scale.

These are estimates, not quotes. They use the same model as the savings calculator. Try your own numbers there.

How this scales with you

The math does not get easier as the fleet grows.

Startup1–10 reservations · one account

One reservation is still real money against a small bill. You can run the math by hand once per purchase. The risk is skipping it.

Growthdozens of reservations · a few accounts

At this size, checking term and payment option by hand every time stops being realistic. A small gap per choice adds up across dozens of choices.

Enterprisehundreds to thousands · many accounts & orgs

Nobody re-runs this math purchase by purchase at this scale. The recommendation must arrive with the math done. The same assumptions apply every time.

The price should scale the way the problem does. It is one flat price whether you run the math once a year or a thousand times a day. It is never a cut of what you save. See pricing.

Where Reserver fits

The math, run on your fleet, every time.

Reserver connects to your AWS accounts with a read-only role. It scans what is running and what you already own. It recommends term, payment option, and quantity, and it shows the break-even and the dollar figures. It also watches three things that turn good math into a wasted purchase. The first is coverage that drifts from the target. See the coverage playbook. The second is terms that lapse unrenewed. See therenewals playbook. The third is a commitment on idle capacity. See therightsizing guide. New to reservations? Readhow to buy your first one. Still on AWS credits? Read howcredits and reservations work together. Learn more in features andhow it works. Thesecurity model explains the read-only connection.

How much do Reserved Instances actually save?

It depends on service, instance class, term, and payment option. AWS publishes ceilings of up to 69% on Amazon RDS, 56% on Amazon ElastiCache, 72% on Amazon EC2. In our price dataset, the median best 1-year offer saves 36% on Amazon RDS, 36% on Amazon ElastiCache, 38% on Amazon EC2. The median best 3-year offer saves 56% on Amazon RDS, 55% on Amazon ElastiCache, 59% on Amazon EC2. The RI Discount Index shows every cell. Reserver works out the exact figure from your own usage.

Which term saves more, 1-year or 3-year?

The 3-year term saves more. In our dataset it adds about 19 points at Partial Upfront. You trade flexibility for that gap. Ask whether the instance family will still run in three years.

Which payment option should I pick?

It is mostly a cash-flow choice. At 1 year, All Upfront adds about 4 points over No Upfront. No Upfront needs no cash at purchase. Partial Upfront sits between the two. None of them change what you can reserve. They only change how much you pay now.

Is it worth the effort for just a few reservations?

Yes. The discount does not shrink because the fleet is small. A Startup fleet spending $3,000 a month still saves about $10,530 a year, and Watch is free. Someone must run the math once per purchase.

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