✓ Royal Mail Authorised Inspector since 2008 | Trading since 2005
Neopost IS-420 postage machine guide
The Neopost IS-420 (Neopost is now Quadient) is a mid-volume franking machine that franks up to 65 letters per minute and supports Mailmark and Smart Meter. It is easy to operate with on-screen prompts and suits businesses sending roughly 300 to 400 items of mail a day.

Mailmark and Smart Meter as standard
The Neopost IS-420 supports the latest Mailmark and Smart Meter franking technologies. The latest generation of franking from Royal Mail is built in as standard, so you benefit from lower postage prices, automatic tariff updates, franking in smart blue ink and access to all VAT services.
This model franks at up to 65 letters per minute. Based on our experience with a similar machine, users sending between 300 and 400 items a day will benefit most from the IS-420. It uses a semi-automatic feeder and franks onto items up to 12mm thick.
You can also stay in control of postage spend using up to 100 departmental accounts, tracking who uses your postage and keeping expenses budgeted. Other optional features include up to 9 job memories, up to 8 advertisements and a range of integrated weighing scales.
Neopost IS-420 features
- Speed: 65 letters per minute
- Feeding system: Semi-automatic
- Tape dispenser: Automatic
- Weighing scales: 3, 5, 10 or 30kg available
- Connectivity: LAN
- Max envelope thickness: 12mm
- Job memories: Yes, 9
- Advertisements: Yes, 8
- Departmental accounts: Yes, 25 or 100
- PIN security: Yes
- Smart Meter technology: Yes
- Mailmark technology: Yes
Neopost IS-420 dimensions
- Length: 74.8cm
- Depth: 37.5cm
- Height: 29.8cm
View our range of franking machines for instant quotes on a machine similar to the Neopost IS-420, or call 01543 572 776.
Frequently asked questions
How fast is the Neopost IS-420? The IS-420 franks at up to 65 letters per minute, which suits businesses sending roughly 300 to 400 items of mail a day.
Is Neopost the same as Quadient? Yes. Neopost rebranded to Quadient, so the IS-420 may be listed under either name.
Does the IS-420 support Mailmark? Yes. The IS-420 supports Royal Mail’s Mailmark and Smart Meter technologies as standard, including franking in smart blue ink and automatic tariff updates.

