Team messaging
What does 5 Slack seats cost in 2026?
At list pricing on the Business+ plan ($15/seat/mo, billed annual), 5 seats run $75/month or $900/year. Real invoices vary with negotiated discounts, add-ons, and mid-cycle changes.
Monthly
$75
Annual
$900
Typical shelfware (25%)
$228/yr
All Slack plans at 5 seats
| Plan | Per seat/mo | Total monthly | Total annual |
|---|---|---|---|
Pro Unlimited history, integrations | $8.75 | $43.75 | $525 |
Business+ SSO, compliance exports | $15 | $75 | $900 |
Enterprise HIPAA, data residency, unlimited workspaces | $22 | $110 | $1,320 |
Source: Slack pricing page. List price, USD, annual billing where offered.
The number nobody puts on the pricing page
SeatMap.AI's Shelfware Index shows the median Slack team runs at 25% inactive seats. On a 5-seat Business+ plan, that's $228/year paid for seats that never showed up.
What a real Slack audit at this size looks like
- Median active-user rate
- 74%
- Shelfware Index benchmark for Slack teams this size.
- Dormancy window
- 90 days
- How long a seat can sit idle before it counts as ghost.
- Hidden cost we flag
- Guest single-channel seats billed as full seats on Business+.
Slack seats are usually reclaimed in the same day the audit runs — the 24-hour warning queue rarely gets challenged because dormant seats correlate almost 1:1 with departed contractors.
"Once we saw the actual last-active-in-Slack timestamp per user, the reclaim call was obvious."
Read the full breakdown in case studies or see the live weekly benchmark on the Shelfware Index.
Other team sizes
10 seats15 seats20 seats25 seats40 seats50 seats75 seats100 seats150 seats200 seats250 seats300 seats400 seats500 seats750 seats1000 seats2000 seats3000 seats5000 seats