Why is the installed base the best place to grow ARPU?
Your current subscribers already trust you with their connection, you already know how they use it, and you don’t pay to acquire them again. ARPU growth from the base comes from three moves: a faster plan, an add-on, or a bundle. The difficulty is not knowing what to offer. It’s knowing who is ready and when.
Mass campaigns ignore that question. They send the same upgrade to the whole base, most of whom don’t need it, and teach subscribers to ignore your messages, including the ones that matter, like outage notices and payment reminders.
Which signals show a subscriber is ready for an offer?
| Signal | Where it lives | What it suggests |
|---|---|---|
| Usage near or over the plan ceiling | Network and usage data | A speed or data upgrade |
| Peak-hour speed complaints on a lower tier | Tickets and call transcripts | An upgrade may fix the complaint |
| Tenure and payment history | Billing record | Readiness for a longer commitment or bundle |
| More devices on the network | CPE and usage data | A higher tier or better in-home Wi-Fi |
| Household changes (move, new service address) | Account and orders | A plan review at the moment of change |
| Recent unresolved issues or outages | Tickets, outage history | Hold the offer and fix the service first |
The last row matters as much as the others. An upgrade offer sent to a subscriber with an open complaint reads as tone-deaf and can push them toward cancelling.
Zone 07 flagged. Ninety-four contacts from one service area in nine days, clustered before a single one was filed as an outage.
Which offers work, and when should they go out?
- Plan upgrade
- Best when usage is near the ceiling or the subscriber complained about peak-hour speed on a lower tier.
- Add-on
- Whole-home Wi-Fi, static IP or extra services, matched to what the household actually uses.
- Bundle
- Several services at a combined price, usually at renewal or after a household change.
Timing is when the need is visible: right after a month of high usage, at contract renewal, or at a move. The channel is the one the subscriber already uses with you. A text for those who pay by link, a call for those who call, email for those who never pick up. One clear offer beats a menu of options.
How do you avoid annoying subscribers?
- Respect consent. Send marketing calls and texts only to subscribers who agreed to receive them, and honor opt-outs everywhere at once.
- Cap frequency. Set a maximum number of offers per subscriber per period, across all channels combined.
- Suppress when it’s the wrong moment. No offers to subscribers with open tickets, recent outages or past-due balances.
- Make it one step to accept. An offer that needs a call back to activate loses most of the people who said yes.
- Tell the full price. Say what happens after any promotional period, up front.
How do you measure whether upselling works?
Measure against a holdout: a random slice of eligible subscribers who receive no offer. Without it, every upgrade in the period looks like a win for the campaign, including the ones subscribers would have made on their own. Review results by offer type and by channel, not only in total, so you can stop the offers that don’t pay back.
| Metric | Why it matters |
|---|---|
Offer acceptance rate Shows whether targeting and timing are right. | Shows whether targeting and timing are right. |
ARPU lift per active line The revenue outcome, net of any discounts given. | The revenue outcome, net of any discounts given. |
Churn among subscribers who received offers Catches offers that push people away instead of up. | Catches offers that push people away instead of up. |
Opt-out rate by channel An early sign you are sending too much. | An early sign you are sending too much. |
Comparison against a holdout group Separates the lift the AI caused from upgrades that would have happened anyway. | Separates the lift the AI caused from upgrades that would have happened anyway. |
Where does Inerxia fit?
Inerxia’s upselling agent scores upsell propensity for each subscriber in real time from usage, plan ceiling, lifetime value and behavior, then delivers plan upgrade, add-on and bundle offers over SMS, outbound voice, in-app push and email, with a handoff to retail when a person should close it.
Inerxia publishes these figures for its upselling agent: +$2.40 ARPU per active line, an 18% offer acceptance rate and 2.1× conversion versus a mass campaign. Agents start at $500 each; see pricing.