AWS SNS Pricing: How To Understand And Optimize Costs

A reliable notifications system can send highly scalable, multi-protocol messages — via email, SMS, or apps — all from one platform. For example, you can send timely cost anomaly alerts directly to your developers on Slack to alert them to potential overspending before it becomes a board meeting emergency.

So, what does this have to do with Amazon SNS pricing? 

Let’s start at the beginning to better understand what you’re paying for when you get that AWS SNS bill.

What Is Amazon Simple Notification Service (SNS)?

Amazon Simple Notification Service (SNS) is a cloud-based messaging service provided by Amazon Web Services (AWS). It enables applications to send messages to various devices and platforms (application-to-application) and people (application-to-person) seamlessly. 

The service operates on a publish/subscribe (Pub/Sub) model, where messages are published to specific topics, and subscribers can receive those messages based on their interests.

AWS SNS pricing covers:

You might be wondering where Amazon SQS fits into all of this.

Amazon SNS Vs. SQS

We can liken the difference between SNS and SQS to a radio broadcasting station and a postal service.

Amazon Simple Queue Service handles messages like a postal service — delivering them one by one to specific recipients. Each letter waits its turn to be picked up and read by a specific recipient. This setup works well for tasks like background processing, where the system must handle messages individually and in sequence.

Amazon SNS operates more like a radio broadcast, simultaneously sending messages to all tuned-in subscribers. So, a single message is delivered to multiple subscribers at once. This approach is suitable for use cases like sending alerts or notifications to a broad audience in real-time without needing individual connections.

Choosing between the two depends on whether your application needs direct, point-to-point communication (SQS) or broad, real-time notifications to multiple recipients (SNS). However, as noted earlier, you can integrate SNS with SQS where applicable.

The prices of both are also different. This post will focus on Amazon SNS pricing.

AWS SNS Pricing: How Is SNS Billing Calculated?

Like many AWS services, Amazon SNS provides a flexible pay-as-you-go model where you pay only for what you use monthly. There are no minimum fees or long-term commitments, so you can scale your messaging needs as needed.

Your Amazon SNS bill is calculated based on several factors. They include:

Here’s a quick breakdown of how each SNS pricing component affects your bill. 

1. Pricing for Amazon SNS API Requests

For Standard topics, pricing is based on the number of monthly API requests, the volume of notification deliveries to various endpoints, and the endpoint type. Your region also affects pricing.

That said, SNS offers the first 1 million Standard topic API requests for free. After that, it starts at $0.50 per 1 million in the US East (Ohio) region.

One billing detail worth understanding: the 64 KB chunking model has a multiplier effect at scale. If you publish a 256 KB message to a Standard topic with 3 HTTP subscribers, that single message generates 4 publish requests and 12 delivery charges (4 chunks × 3 subscribers = 12). Teams running large payloads through fan-out patterns often discover their actual bill is significantly higher than the per-message rate suggests. The fix is to keep messages small — send a reference (like an S3 key or database ID) and let subscribers fetch the full payload separately.

Pricing for FIFO topics is based on the number of messages published and subscribed to, with each message up to 256 KB counted as one. Your region also matters, with US East (Ohio) offering the cheapest rates.

Also note that:

That’s not all.

2. Pricing for notification deliveries

As mentioned above, each delivery to endpoints (excluding SMS) is also charged per 64 KB chunk. For instance, a 256 KB notification would be billed as four deliveries.

3. Pricing for SMS messaging

SMS costs vary by destination country and can include telecom carrier fees. Users can send SMS messages marked as transactional or promotional. For US destinations, expect to pay approximately $0.00581–$0.00645 per SMS segment, depending on carrier and message type. Rates vary significantly by country.

Be aware that SMS messages have character limits per segment — 160 characters for GSM-7 encoding (standard text) and 70 characters for UCS-2 (Unicode/emoji). Messages exceeding these limits are automatically split into multiple segments, and you pay for each one. A 320-character standard text message, for example, would be billed as 3 segments.

Also note: starting November 2024, SMS charges appear under AWS End User Messaging on your AWS bill rather than under Amazon SNS. Pricing hasn’t changed — only the billing label.

4. SNS data transfer fees

Data transfer into Amazon SNS is free, while data transfer out charges start at $0.09 per GB for the first 10 TB per month. The rate reduces gradually to $0.05 per GB for up to 150 TB per month. There are no charges for data transfers between SNS and Amazon EC2 within the same region.

One nuance worth noting: data transfer from SNS to SQS and Lambda is charged at internet data transfer rates, even within the same region — despite these endpoints having no per-notification delivery charge. For small messages at moderate volumes, this cost is negligible (a few cents), but at 100 million 10 KB messages per month (~1 TB of transfer), it adds up to around $90 in data transfer costs you might not have budgeted.

5. Pricing for message filtering and archiving

Attribute-based message filtering is free. Pricing for payload-based message filtering is based on the amount of outbound data scanned. It is typically $0.09 per GB of scanned payload data.

Message archiving costs depend on storage duration and data size. They start at $0.10 per GB for archive processing of stored payload data while in-place storage costs $0.023 per GB-month.

6. Additional features and integrations

Using AWS Key Management Service (KMS) for encryption incurs additional charges — and this cost can scale quickly in fan-out patterns. Each Publish call generates one KMS GenerateDataKey call, and each delivery to each subscriber generates a Decrypt call. For a topic with 5 subscribers, a single publish triggers 6 KMS calls. At $0.03 per 10,000 KMS requests, 10 million publishes to 5 subscribers would cost $180/month in KMS fees alone.

Message protection features, such as scanning for sensitive content, incur additional fees. It costs $0.19 per GB of audit reporting data generated and $0.08 per GB of payload data for scanning and protecting (unidentified or blocked) publish and delivery messages.

You’ll want to watch these key AWS SNS pricing factors to optimize your SNS bill.

You’ve probably noticed that calculating Amazon SNS costs manually can be overwhelming, particularly at scale.

With that in mind, let’s explore practical steps to optimize your SNS spending.

What Does AWS SNS Actually Cost? A Real-World Example

Before diving into optimization, it helps to see what a typical workload looks like in practice. Consider a mid-size SaaS platform publishing 5 million event notifications per month (average 10 KB each) to a Standard topic with 3 SQS subscribers and 1 HTTP webhook:

Under five dollars for 5 million messages to 4 endpoints — largely because SQS and Lambda subscribers don’t incur delivery charges. If all four subscribers were HTTP endpoints instead, delivery costs alone would jump to roughly $12. The endpoint you deliver to has the biggest impact on your per-message cost.

Amazon SNS Cost Saving Tips And Best Practices 

Use the following strategies and best practices for optimizing Amazon’s Simple Notification Service (SNS).

Use PublishBatch for Standard Topics

The PublishBatch API lets you send up to 10 messages in a single API call (max 256 KB total). Since you’re billed per request, batching 10 small messages into one call reduces API request costs by up to 90%. Publishing 10 million messages individually costs $5.00 in API fees; batching them in groups of 10 costs $0.50. For any workload exceeding the free tier, this is the single biggest optimization lever available.

Start with the Free Tier

You get a million API requests per month for free — permanently, not just for the first 12 months like some AWS services. Combined with free SQS and Lambda deliveries, development, testing, and low-volume production workloads can effectively run at $0/month. Use this to understand your SNS usage patterns before committing to larger volumes.

Trim your messages

SNS charges are based on the number of 64 KB chunks, so keeping message sizes smaller can reduce costs. A 256 KB message costs 4× what a 10 KB message costs — on both the publish and delivery side. Compressing messages or using references to Amazon S3 payloads instead of sending large payloads directly can cut your costs significantly.

Pick the right topic

Select between Standard and FIFO (First-In-First-Out) topics based on your needs. Standard topics are roughly 4-5× cheaper than FIFO for equivalent workloads, because FIFO’s triple-billing model (published messages + subscribed messages × number of subscriptions + payload data) multiplies costs as subscribers grow. FIFO topics are necessary when you need strict ordering or exactly-once deduplication, but for workloads that tolerate best-effort ordering and at-least-once delivery, Standard topics save significant money.

Filter your messages

Attribute-based message filtering is free and lets you send messages only to relevant subscribers, reducing unnecessary deliveries and associated costs. Payload-based filtering, by contrast, costs $0.09 per GB scanned — and both filtered and delivered messages count toward that total. Move filtering criteria into message attributes wherever possible for a free optimization that requires minimal code changes.

Deliver to SQS or Lambda whenever possible

SQS, Lambda, and Data Firehose endpoints have zero per-notification delivery charges. HTTP endpoints cost $0.06 per 100K, and email costs $2.00 per 100K. When you have flexibility in endpoint choice, routing through SQS or Lambda gives you the lowest total delivery cost.

Optimize SMS messaging

SMS is by far the most expensive SNS component — for US destinations, origination identity costs (10DLC at ~$11/month vs. short codes at $995/month) stack on top of per-message fees. Validate phone numbers before sending, since you’re charged even for failed delivery attempts to invalid numbers. Set account-level SMS spend limits to prevent runaway charges, and use the promotional message type for non-critical messages in countries where it’s supported.

Keep this healthy habit

Regularly review and adjust your Amazon SNS policies and configurations. You always want them aligned with current business needs and cost optimization goals. Adjust delivery protocols, subscription policies, and message formats to maintain efficiency and control costs.

Set a budget and monitor usage

Use AWS Cost Explorer to analyze your SNS usage patterns and set budgets. Track key CloudWatch metrics like NumberOfMessagesPublished, NumberOfNotificationsDelivered, and PublishSize to catch cost anomalies early.

But if AWS costs have kept you up at night or you need to reduce your AWS bill sustainably, consider using a more robust cloud cost optimization platform like CloudZero. Rather than manually tracking each service’s pricing nuances, CloudZero lets you see exactly what’s driving your costs — mapped to the engineering dimensions that actually matter, like cost per customer, cost per feature, or cost per team.

View, Control, And Optimize Your AWS Cloud Costs With Precision  

With CloudZero, you get these and more:

Innovative brands like Shutterstock, Wise, and MalwareBytes trust CloudZero to help them understand, manage, and optimize their cloud costs. We just helped Upstart save $20 million. Ready to take the next step? to experience CloudZero risk-free!

Pricing information last verified May 2026. AWS pricing varies by region, and rates may change. Please verify current details on the official AWS SNS pricing page before making decisions.