Per-minute, per-line, per-plan.
Voice bills can have hundreds of line items per customer. Generic billing software either flattens them or breaks.
Sonar 2026 · Issue 05 · For voice operators
VoIP
Subscriber billing for voice. Built for the modern stack.
Per-line and per-minute billing, embedded payments, and customer ops in one platform.
Why voice billing is its own discipline
Per-minute meters, regulatory fees, and softphone fleets. Generic SaaS billing doesn't cut it.
Compliance at every state line.
911 fees, regulatory pass-throughs, USF charges. Different rules in every jurisdiction. Errors are filing risk.
Toll fraud + reconciliation.
International calling abuse can drain margin in hours. Generic billing software doesn't see the patterns.
Capabilities for voice operators
Voice billing.
Done right.
Sonar handles the per-minute, per-line, multi-jurisdiction reality of voice billing without spreadsheets in the middle.
Per-minute, per-line, per-plan, per-jurisdiction.
Voice-specific billing rules: call detail records imported, rated, taxed, and invoiced. Plan tiers, rollover minutes, international rate decks all handled.
- CDR import and rate-card calculation
- Plan tiers, rollover minutes, international rate decks
- Multi-jurisdiction tax engine across US states and Canadian provinces
Voice Billing’s flow
From CDR to invoice
- 01
CDRs imported
Call records pulled and matched to subscriber lines.
Billing Tools - 02
Rates applied
Plan rate-card and international decks calculated per call.
Billing Tools - 03
Taxes applied
State, federal, USF, and 911 fees calculated automatically.
Billing Tools - 04
Invoice issued
Multi-line invoice with full call detail.
Billing Tools - 05
Payment captured
Visa, Mastercard, ACH via embedded Sonar Billing.
sonarPay
Field reality · VoIP
Per-minute, per-line, per-plan.
Frequently asked
Common questions about voip.
- Can Sonar bill per-minute and per-line voice?
- Yes. Sonar imports call detail records, rates them against rate decks, applies plan tiers and rollover minutes, and invoices, with multi-jurisdiction tax across US states and Canadian provinces.
- Does Sonar handle voice regulatory fees?
- Voice billing accounts for the per-jurisdiction reality of 911 fees, USF charges, and regulatory pass-throughs, so invoices stay compliant instead of becoming filing risk.
- How does Sonar track phone numbers and porting?
- Each line is a record, with plan changes, ports, and ports-out tracked at the line level and full call history visible to support on pickup.
- Can Sonar flag toll fraud?
- Yes. Reporting includes toll-fraud anomaly detection alongside margin-per-plan and international usage cohorts, so abuse surfaces before it drains margin.
Other industries
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