How much do uptime probes cost as cron triggers?
Scenario · workers
One hundred checks every minute is 4.32 million invocations at 2 ms. Cron CPU limits are separate from this dollar math: a sub-hour cron defaults to 30 seconds of CPU on Paid.
On the Paid plan this model comes to $5.00. The other plan, with the same inputs, comes to $0.00. The 30-day month is the same length R2 uses in its storage example. Daily free caps are not monthly pools.
CPU is active time, not wall time
Waiting on the network, KV, or D1 does not count as CPU. Paid usage includes 30 million CPU milliseconds and then charges $0.02 per million, prorated. The Free plan allows 10 ms per invocation and fails with error 1102 past that. It is not a monthly pool.
Read this before you trust the total
Free plan lines at $0 can still be an outage: error 1027, error 1102, or a D1 quota error. R2 above its monthly free tier is billed on both plans. Durable Object requests round up to the next million, as in Cloudflare's own Example 1, which bills 500,000 requests as 1 million.
This model
$5.00 · Paid
The $5 is an account minimum for Workers Paid, not a per-product fee. Included usage sits inside it.
Assumptions
- A 30-day month and steady traffic across it.
- Rates as published on 2026-10-25; taxes excluded.
- The Workers Paid plan has a $5 monthly minimum. It is charged even if you use nothing, and it covers the included allowances.
- Everything you entered fits inside the included allowances, so you pay only the minimum.
Sources
- Workers pricingOfficial
- KV pricingOfficial