The Hidden Cost of Your Public Cloud Spend

Uncover the hidden costs of your public cloud spend. Learn how cloud spend management can help you keep it under control.

Why Cass?

Cloud Transfer Costs


If your enterprise depends on public cloud providers like AWS, Azure, or GCP, then you’ve probably seen some unexpected charges appearing on your monthly cloud bill. The most common cause of these hidden expenses is cloud transfer costs.

While all public cloud providers let their customers upload data to the cloud for free, downloading that data or moving it onto the public internet can be costly. These hidden network transfer costs quickly add up, especially if you're downloading or moving out large volumes of data regularly.

For example, AWS will charge you for transferring data between its platform and the public internet, and also within AWS between services such as EC2 or S3. If one of your applications is serving 150TB of data per month with a cost of $0.05/GB, this can cost your enterprise $7500/month in transfer costs alone.

To help you visualize these costs, our interactive image will show you how much AWS charge to move your data in, out, or around your cloud environment.

Click on the arrows to see the transfer costs.

Between AZs

Data transfer in: $0.01/GG*

Data transfer out: $0.01/GB*

*Costs may vary by region

Between Instances Within AWS

Data transfer between instances can be costly if you use public IP address.

Data transfer in/out:
If using a Private IP: FREE*
If using a Public IP: $0.01/GB*

*Costs may vary by region


Data transfer in: FREE*

Data transfer out: $0.02/GB*

*Costs may vary by region

Public Internet Data Out

Egress costs are billed at region-specific and tiered data transfer rates.

Data transfer out: $0.09/GB*

*Costs may vary by region

Public Internet Data In

The ingress price for all the major cloud providers is free. So you can input your data without any charges.

Data transfer in: FREE*

*Costs may vary by region

The Challenges of Managing Enterprise Cloud Spend

While cloud transfer fees contribute significantly to enterprise overspend, they aren’t the only challenge when it comes to keeping cloud costs in check.


Different Pricing & Subscription Models

Enterprises often juggle multiple public cloud providers, each with complex and multifaceted pricing and subscription models. Lack of standardization means that billing formats, APIs, and services differ between each major public cloud provider.


Cost of Cloud

Incorrect resource provisioning is one of the biggest offenders when it comes to driving up cloud costs. It’s common for enterprises to grossly over-estimate how much they need. To stay in control, automated monitoring and alerts about usage are essential.


Shadow IT

Shadow IT refers to solutions, software, systems, applications, and services that slip under the radar without your IT department’s direct consent. As this technology isn’t actively monitored, it can put your cloud at risk and push costs up without you even realizing it.


Complex Cloud

Without adequate visibility over your cloud estate, it’s easy for cloud migration costs to go off the rails. Operational expenditure, paying for unnecessary excess cloud storage, and recurring admin costs can make a sizeable migration incredibly expensive.

How Can Cloud Spend Management Help?

By partnering with a cloud spend management provider you can reign in your cloud spend and eliminate the hidden costs. Here’s how.


Continuous Cloud Auditing Services

By reviewing, auditing, and optimizing your cloud, a spend management provider will pinpoint wasted resources, shadow IT, hidden costs, or extra capacity that are causing needless spending. Regular cloud auditing gives your enterprise valuable data and insights, so you can strategize and scale your cloud with complete confidence.


Tracking Billing
and Data

A cloud spend management provider will combine your multi-cloud billing into one general ledger, eliminating the stress of managing multiple, disparate platforms. Plus, by leveraging detailed billing and usage data from your CSPs, you can quantify exact spending across your IaaS and PaaS environments, so you’ll never experience bill shock ever again.



Rightsizing is a pillar of cloud cost optimization and spend management. By identifying the ideal resource supply to meet demand, you can reduce wastage, ensuring your cloud is always operating at peak capacity. An experienced cloud spend management provider will review your hourly usage reports, to establish idle periods, so you can spin down resources when they’re not required.

Reserved Instance Purchasing Recommendations

A cloud spend management provider will help you to determine the best purchasing strategy and identify cost savings across the purchasing cycle. They’ll also help you through better reserved instance and usage plan purchasing. Reserved instance purchase recommendations track your real-time usage and provide your computing power at a discounted rate.

Your provider can also assume control of migrations, working directly with vendors to maximize the cost-benefit. So, instead of overpaying for resources you don’t need, you can spot purchase to match demand.


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