Azure Bastion Cost Calculator
UK South pricing · Basic, Standard & Premium tiers · Scaling units · Always-on billing
Prices from Azure Retail Prices API · UK South · GBP · Not affiliated with Microsoft
Azure Bastion bills 24/7 — even when idle
Unlike VMs you can deallocate, Bastion runs continuously once deployed. Standard tier costs ~£159/month whether anyone connects or not. Only deploy Bastion if it is permanently needed.
Bastion configuration
Supports ~50 concurrent sessions · 2 units × £0.1053/hr
Inbound is free. First 100 GB outbound free.
warningAzure Bastion billing traps
No off switch
Bastion has no deallocate option. The only way to stop billing is to delete the resource. Build deletion into your offboarding runbook.
Scaling units are cumulative
Standard starts at 2 units (included in the base rate). Each additional unit adds ~£0.10/hr on top. At 10 units you pay ~£0.84/hr rather than ~£0.22/hr.
Per-host vs shared deployment
One Bastion per VNet. If you have 3 VNets with peering you still typically need 3 Bastion instances — tripling the cost. Consider hub-spoke consolidation.
VPN Gateway is cheaper for bulk access
If many users need persistent network-level access, a VPN Gateway (from ~£104/month for VpnGw1) with P2S VPN may be cheaper than Standard Bastion at scale.