Business plan information
Prices, inclusions and terms for services you buy for your own business.
Monthly prices include GST, with the excluding-GST amount alongside. nbn plans include unlimited data. Voice prices are per seat or channel; telephone numbers and chargeable calls are additional. Read the individual summary for the complete configuration and minimum cost.
- Business nbn 25/5Critical Information Summary$59.40 incl. GST / month$54.00 excl. GST
- Business nbn 50/20Critical Information Summary$99.00 incl. GST / month$90.00 excl. GST
- Business nbn 500/50Critical Information Summary$108.90 incl. GST / month$99.00 excl. GST
- Business nbn 500/200Critical Information Summary$138.60 incl. GST / month$126.00 excl. GST
- Business nbn 750/50Critical Information Summary$121.00 incl. GST / month$110.00 excl. GST
- Business nbn 1000/100Critical Information Summary$134.20 incl. GST / month$122.00 excl. GST
- Business nbn 1000/400Critical Information Summary$171.60 incl. GST / month$156.00 excl. GST
- Business nbn 2000/200Critical Information Summary$215.60 incl. GST / month$196.00 excl. GST
- Business nbn 2000/500Critical Information Summary$279.40 incl. GST / month$254.00 excl. GST
- Hosted PBX: pay as you goCritical Information Summary$16.50 incl. GST / month per seat$15.00 excl. GST
- Hosted PBX: unlimited Australian callsCritical Information Summary$29.70 incl. GST / month per seat$27.00 excl. GST
- SIP trunk channelCritical Information Summary$16.50 incl. GST / month per channel$15.00 excl. GST
Additional voice charges
Telephone numbers are charged separately from seats and channels. Incoming calls to 13, 1300 and 1800 numbers carry the usage charges below. These charges are outside an unlimited seat's call inclusion.
| Number type | Monthly price |
|---|---|
| Local number | $5.50 incl. GST ($5.00 excl. GST) |
| Block of 10 local numbers | $33.00 incl. GST ($30.00 excl. GST) |
| Block of 50 local numbers | $49.50 incl. GST ($45.00 excl. GST) |
| Block of 100 local numbers | $82.50 incl. GST ($75.00 excl. GST) |
| 13, 1300 or 1800 number | $16.50 incl. GST ($15.00 excl. GST) |
A 13 number can also attract a separately disclosed government charge. Completed single-number ports are free in or out. Block ports, rejected ports, complex reschedules and complex port-outs carry third-party charges disclosed before the request.
| Call type | Per-minute rate, billed per second |
|---|---|
| Answered on a fixed line, local | 8.8c incl. GST (8c excl. GST) |
| Answered on a fixed line, national | 9.9c incl. GST (9c excl. GST) |
| Answered on a fixed line, from a mobile | 15.4c incl. GST (14c excl. GST) |
| Answered on a mobile | 33c incl. GST (30c excl. GST) |
nbn key facts and performance-disclosure status
Transit, private networks, colocation and engineering are quoted around your requirements. Your quote identifies the scope, charges, commitments and any additional disclosures. Discuss your requirements.
The IT Dept Pty Ltd, trading as Underlay Networks · ABN 12 665 405 505
Updated 1 October 2026 · Version 2026-10-01.1