How much does an idle p3.16xlarge cost on AWS?
A p3.16xlarge billed on-demand and left running around the clock costs about $17,870/mo at its cheapest listed region (us-east-1). Scheduling it off outside business hours cuts that to roughly $5,319/mo — a $12,552/mo saving.
Cheapest on-demand
$24.4800/hr
us-east-1
Running 24/7
$17,870/mo
730-hour month
Business-hours savings
$12,552/mo
70% off the 24/7 bill
Price by region
| Region | Hourly (on-demand) | Spot (typical) | ≈ Monthly (24/7) |
|---|---|---|---|
| us-east-1 Cheapest | $24.4800/hr | $3.1824/hr | ≈ $17,870/mo |
| us-east-2 | $24.4800/hr | $6.1200/hr | ≈ $17,870/mo |
| us-west-2 | $24.4800/hr | $5.8752/hr | ≈ $17,870/mo |
| eu-west-1 | $26.4400/hr | $6.8744/hr | ≈ $19,301/mo |
| eu-central-1 | $30.5840/hr | $20.4913/hr | ≈ $22,326/mo |
| ap-northeast-1 | $33.5520/hr | $18.4536/hr | ≈ $24,493/mo |
| ap-southeast-1 | $33.8720/hr | $33.1946/hr | ≈ $24,727/mo |
| ap-southeast-2 | $33.8720/hr | $19.9845/hr | ≈ $24,727/mo |
What a schedule saves
| Schedule | Monthly cost | Savings vs 24/7 |
|---|---|---|
| Running 24/7 | $17,870/mo | baseline |
| Weekdays only (off on weekends) | $12,765/mo | -$5,106/mo (29%) |
| Business hours only (10×5) | $5,319/mo | -$12,552/mo (70%) |
Assumes a 730-hour month at on-demand list price. Actual savings depend on when the instance is actually used.
About the p3 family
P3 carries NVIDIA V100 GPUs built for serious distributed training and HPC — the kind of instance a team rents by the hour for a training run. The waste here is subtle: the run finishes, everyone moves on, and the multi-GPU box keeps billing at anywhere from three to twenty-five dollars an hour depending on size because nobody circled back to stop it.
Regional pricing varies: p3.16xlarge runs $24.4800/hr in us-east-1, the cheapest region priced here, versus $33.8720/hr in ap-southeast-1, the priciest — a 28% spread across regions for the identical instance type.
Common questions
How much does an idle p3.16xlarge cost per month?
At the cheapest listed region (us-east-1), a p3.16xlarge costs $24.4800/hr, or about $17,870/mo if it runs 24/7. That's the on-demand list price — an idle instance costs exactly the same as a busy one, since cloud billing doesn't know the difference.
How much can I save by scheduling it off outside work hours?
Restricting it to business hours only (10×5) saves about $12,552/mo (70%) versus running 24/7. A lighter schedule — on around the clock on weekdays, off on weekends — still saves about $5,106/mo (29%).
Is p3 still a reasonable choice against newer GPU families?
For new training work, mostly no — newer accelerators deliver more per dollar. p3 fleets persist because of CUDA version pins, reserved-instance commitments, and inertia. If one is still in your account, check its utilization first: a legacy GPU box idling between occasional runs is the most expensive kind of nostalgia.
Other p3 sizes
Stop paying for idle AWS servers
Idlefy runs a free audit of your fleet, then flips dev servers to stopped-by-default: lease one when you need it, and
when the lease ends it shuts itself off — stop, not terminate, persistent disks intact. Timers are set by your team, never
guessed, and Idlefy only manages instances tagged idlefy=enabled — on AWS that boundary is enforced by the IAM policy itself.
Prices are on-demand list price for Linux instances and exclude storage, network, data transfer, and any negotiated or volume discounts. Actual bills vary by usage and account-level pricing. Prices as of 2026-07-20. Spot figures are indicative — AWS values are derived from AWS's published typical savings vs on-demand for the region; GCP values are the listed Spot price. Spot capacity can be reclaimed by the provider. Stopping preserves EBS and persistent-disk volumes; data on local instance-store or local-SSD drives does not survive a stop.