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Prices from Azure Retail Prices API · UK South · GBP · Not affiliated with Microsoft

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

warning

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

All Basic featuresShareable linksIP-based connectionCustom portsNative client (RDP/SSH)Azure AD auth
2

Supports ~50 concurrent sessions · 2 units × £0.1053/hr

Inbound is free. First 100 GB outbound free.

Calculating…

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.