Reviewed by: SureTel Network Engineering Team
Expertise: VoIP infrastructure, SIP routing, telecom cost optimisation.
Last updated: March 2026
Why business phone costs can become expensive
Even with the adoption of modern VoIP systems, many businesses still struggle with rising telecom expenses. Phone costs often increase because of inefficient call routing, poor provider pricing, unnecessary features, lack of call monitoring, and expensive international rates.
For growing organisations such as call centres, professional services firms, and multi-branch businesses, communication costs can quickly become a significant operational expense.
Fortunately, VoIP technology offers several ways to optimise and reduce those costs.
Why business phone costs increase
Businesses often see telecom expenses increase over time due to several factors.
Common Causes of Rising Telecom Costs
| Cost Driver | Impact | VoIP Solution |
|---|---|---|
| Legacy PBX hardware | Expensive line rentals & maintenance | Cloud PBX eliminates hardware |
| Inefficient call routing | Higher per-minute costs | Least cost routing (LCR) |
| Unmonitored usage | Unnecessary call traffic | Call analytics & reporting |
| Scaling teams | More users = more phone costs | Per-extension pricing from R40/month |
| Inter-branch calls | External call charges | Free extension-to-extension calling |
| International calling | Premium rates per minute | Competitive VoIP international rates |
VoIP vs traditional telecom pricing
VoIP systems are generally far more cost-efficient than legacy telecom infrastructure. Traditional phone systems often require multiple physical lines, hardware PBX systems, maintenance contracts, and expensive upgrades.
VoIP eliminates much of this infrastructure by delivering voice communication over internet connections.
Traditional Telecom vs VoIP Cost Comparison
| Cost Category | Traditional PBX | VoIP / Cloud PBX |
|---|---|---|
| Hardware | R50,000–R200,000+ upfront | Minimal or none |
| Per extension / month | R150–R400 | From R40/month |
| Local call rates | R0.80–R1.50/min | From R0.30/min |
| Internal calls | Billed externally | Free (extension dialing) |
| Maintenance | Annual contracts required | Included in service |
| Scaling | Hardware upgrades needed | Add users instantly |
Indicative pricing for South African market. Actual rates depend on provider and plan.
Businesses that migrate to VoIP often reduce communication costs by 40–60%. Learn more about SureTel VoIP Solutions.
Seven ways businesses can reduce VoIP costs
Cost Reduction Strategy Summary
| # | Strategy | Potential Savings | Best For |
|---|---|---|---|
| 1 | Choose the right provider | 20–40% | All businesses |
| 2 | Use bundled minute plans | 30–50% | Call centres, sales teams |
| 3 | Optimise call routing | 15–25% | High-volume callers |
| 4 | Use internal extension calls | 100% on internal | Multi-branch businesses |
| 5 | Choose efficient codecs | Bandwidth savings | Bandwidth-limited sites |
| 6 | Monitor call analytics | 10–20% | All businesses |
| 7 | Improve connectivity | Reduced downtime | All businesses |
1. Choose the right VoIP provider
Not all VoIP providers offer the same pricing models. Businesses should compare call rates, bundled minutes, extension pricing, and support services. Selecting a provider that offers transparent pricing can significantly reduce long-term costs.
Explore SureTel VoIP services for competitive, transparent pricing.
2. Use bundled minute plans
Minute bundles can dramatically reduce per-minute costs for businesses with high call volumes. Instead of paying per call, businesses purchase a monthly bundle of minutes at a discounted rate — starting from R300/month for basic bundles.
This model is particularly effective for call centres, sales teams, and customer support departments.
Bundle vs Per-Minute: Example Comparison
| Scenario | Per-Minute Cost | Bundle Cost | Monthly Saving |
|---|---|---|---|
| 500 minutes/month | R400 (at R0.80/min) | R300 bundle | R100 (25%) |
| 2,000 minutes/month | R1,600 | R900 bundle | R700 (44%) |
| 10,000 minutes/month | R8,000 | R3,500 bundle | R4,500 (56%) |
Illustrative examples. Actual rates depend on provider and destination.
Use our VoIP Cost Calculator to estimate your business phone costs.
3. Optimise call routing
VoIP systems can intelligently route calls to the lowest-cost carrier. This technique, often called least cost routing (LCR), helps businesses minimise telecom expenses by automatically selecting the most affordable route for each call.
4. Encourage internal extension calls
VoIP allows internal calls between employees to take place over the same system. Employees across branches can communicate without generating external call charges. For multi-branch businesses, this alone can eliminate a significant portion of telecom costs.
Learn more about VoIP for multi-branch businesses.
5. Choose efficient codecs
Certain VoIP codecs use less bandwidth, allowing more calls to occur over the same internet connection. For example, the G.729 codec typically uses around 32 kbps per direction per call, compared to G.711 which uses approximately 80–100 kbps per call.
Using efficient codecs can improve network efficiency and reduce infrastructure requirements. Read our detailed VoIP codecs comparison guide.
6. Monitor call analytics
Modern VoIP systems provide detailed reporting on call usage. These analytics allow businesses to identify excessive call durations, high-cost destinations, and inefficient calling patterns. By analysing this data, businesses can implement targeted cost control strategies.
7. Improve connectivity reliability
Unstable internet connections cause call quality problems and dropped calls, which increases operational inefficiency. Using reliable business connectivity improves VoIP performance and reduces wasted resources.
Hidden VoIP costs businesses should monitor
Even VoIP systems can generate unexpected costs if they are poorly managed.
⚠️ Hidden Cost Watch List
Read our guide on VoIP security risks and fraud prevention to protect your system from toll fraud.
When businesses should consider changing VoIP providers
Switching providers may be beneficial if a business experiences:
- Poor call quality or frequent dropouts
- Unreliable service or frequent outages
- Expensive call rates compared to market alternatives
- Poor technical support and slow response times
- Limited scalability as the business grows
Modern VoIP providers offer flexible cloud-based platforms designed to support growing organisations. Learn more about business VoIP solutions in South Africa.
SureTel VoIP solutions
SureTel provides VoIP and cloud PBX solutions designed to help South African businesses optimise communication costs. Our solutions include flexible VoIP plans, competitive call rates from 30c/minute, bundled minute packages from R300/month, enterprise-grade infrastructure, and scalable communication platforms.
Learn more: