OCI networking costs explained.

Because the egress penalty is so much smaller, OCI changes some architecture decisions outright. Here is how the networking bill is built and where to look first.

How does OCI price data transfer?

Inbound data transfer into OCI is free, as it is on the other clouds. Outbound data transfer to the internet comes with a free monthly allowance, indicatively 10 terabytes, after which it bills per gigabyte at a low rate. Traffic within an availability domain is generally free, and traffic between availability domains in the same region is free or low cost. Cross region traffic, the data you move between OCI regions for replication or disaster recovery, is where internal transfer charges concentrate.

The practical effect is that an estate serving moderate volumes to the internet may pay nothing for egress, and even a data heavy estate pays far less than it would on a hyperscaler. That does not mean you ignore it. It means you spend your attention on the lines that actually move the bill rather than on egress that is mostly free.

What does FastConnect really cost?

FastConnect is OCI dedicated private connectivity between your network and OCI. You pay for the port by the hour based on its capacity, and there is no per gigabyte charge from OCI for traffic over FastConnect, which is part of why it is attractive for high volume private connectivity. The cost to watch is provisioning a port far larger than your sustained throughput, or running a partner or telco circuit whose monthly charge dwarfs the OCI port fee. Right size the port to real utilization and review whether a partner connection still earns its monthly cost.

Because OCI egress is cheap, the classic hyperscaler calculation of FastConnect paying for itself purely by avoiding egress charges is weaker here. Justify FastConnect on latency, throughput, and security needs, and size it to measured traffic rather than to a peak that rarely arrives.

Where do load balancers quietly add up?

OCI load balancers bill on the provisioned bandwidth shape and instance hours, and flexible load balancers let you set a minimum and maximum bandwidth so capacity tracks demand. The common waste pattern is idle or orphaned load balancers left behind after an application is retired, and load balancers provisioned at a high fixed bandwidth shape for a workload that never approaches it. Inventory every load balancer, match it to a live backend, retire the orphans, and move fixed shapes to flexible bandwidth so you pay for the throughput you use.

What about NAT gateways and service gateways?

NAT gateways let private resources reach the internet for outbound only traffic and carry a data processing charge per gigabyte, the same quiet budget eater that catches teams on other clouds. Where workloads only need to reach OCI services such as object storage, a service gateway keeps that traffic on the OCI backbone and avoids the NAT data processing charge entirely. Routing OCI bound traffic through a service gateway rather than a NAT gateway is a standing win that costs nothing to implement and removes a per gigabyte charge.

How does cheap egress change your architecture?

The low egress price is not just a smaller bill. It removes a constraint that shapes design on the hyperscalers. Patterns that the egress penalty discourages elsewhere, such as serving large volumes directly from object storage, replicating data across regions, or running a workload on OCI while integrating with services in another cloud, become far more affordable. When you place data heavy or egress heavy workloads, OCI deserves a real look precisely because the data movement that dominates those bills elsewhere is a fraction of the cost here. Use that advantage deliberately rather than letting it go unnoticed.

Get OCI networking off your list of surprises

We map every OCI networking line to the architecture that drives it, retire idle load balancers and FastConnect ports, and use the free egress allowance deliberately so data movement stops being a surprise. We take zero provider commissions. Our guarantee: we reduce your cloud spend or we reimburse our service fee. Pricing is a Fixed Fee scoped up front or Gainshare, a share of verified savings with no retainer and no risk.