Pub/Sub Cost Forecast
AWS SNS Pricing Calculator
Estimate SNS publish and delivery costs for Standard and FIFO topics with fan-out and payload assumptions.
- No signup
- Instant results
- ~2 min
Rates reviewed
Read the full breakdown — Amazon SNS Pricing covers billing dimensions, traps, and a 30-day cleanup plan.
Topic type
us-east-1list rates, pricing as of 2026-10-20. SMS uses the US rate including carrier fee (10DLC/toll-free); other countries differ. Source: AWS public pricing.
Publish & delivery volume
Payloads bill in 64 KB chunks — same model as SQS request units.
Each 64 KB chunk counts as one request unit. Payloads above 256 KB (up to 1 MiB) need the topic's MaximumMessageSize attribute raised.
Fan-out multiplies delivery attempts per publish.
Estimated SNS Cost
Publish + delivery line items
Total Monthly Cost
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FactualMinds reviews event-driven architectures for publish fan-out, FIFO ordering needs, and when SNS + SQS beats direct Lambda invocation on cost.
Talk to FinOps Experts →Who This Tool Is For
Backend engineers, platform teams, and FinOps leads designing pub/sub, event notification, or fan-out patterns with SNS.
Why We Built This Tool
SNS bills stack publish request units, per-subscriber delivery attempts, and channel-specific rates — fan-out to many HTTP endpoints can dominate the invoice.
What Problem It Solves
- Topic type choice. Compare Standard free tier vs FIFO ordering costs.
- Payload impact. Large messages multiply billable publish units via 64 KB chunks.
- Delivery mix. Model HTTP/S, email, SMS, and mobile push on one screen.
Cross-check queue-side costs with the SQS pricing calculator or explore cloud cost optimization.
Frequently Asked Questions
Where do these SNS prices come from?
Rates are AWS published us-east-1 list prices (AWS SNS pricing), pricing as of 2026-10-20.
How are payloads billed?
Each 64 KB chunk of payload counts as one request unit for publish pricing — identical to the SQS request-unit model.
Does Standard SNS have a free tier?
Yes — the first 1 million Amazon SNS API requests per month are free for Standard topics. FIFO topics have no free tier.
How does fan-out affect cost?
Each subscription receives a delivery attempt per publish. HTTP/S delivery is billed separately from publish requests — high subscriber counts multiply delivery charges.
Are SMS rates exact?
No. SMS pricing varies by country, carrier, and message type. This calculator uses the US rate of $0.01195/message ($0.00774 base + $0.00421 carrier fee for 10DLC and toll-free numbers) — check the AWS End User Messaging SMS price list for other countries.
SNS vs SQS — when do I need both?
SNS fan-out to multiple SQS queues is a common pattern: SNS handles publish-once, SQS buffers per-consumer processing. Model both sides with this calculator and the SQS pricing calculator.
