The wholesale airtime costing guide is where an MVNO business plan stops being a proposition deck and becomes an operating model. A compelling brand, distribution partner or niche customer segment cannot compensate for a tariff book built on incomplete wholesale assumptions. The problem is rarely that founders forget the cost of a gigabyte. It is that they treat airtime as a single variable when it is a stack of contracted charges, technical dependencies, customer behaviours and commercial commitments.
For an MVNO, cost discipline begins before the first rate card is signed. The objective is not simply to secure the lowest price per MB, minute or SMS. It is to understand the cost to serve a customer, the margin contribution of each tariff, and the point at which volume commitments start helping rather than hurting the business.
Start the wholesale airtime costing guide with the commercial model
The same host network price can produce very different economics depending on the MVNO model. A light MVNO using an MVNE may receive a bundled wholesale proposition covering connectivity, billing, SIM or eSIM provisioning, customer care tools and regulatory support. A thicker MVNO may contract separately for network access, core network elements, charging, CRM and operations. Neither approach is inherently superior. The right choice depends on scale, speed requirements, differentiation and the capability the MVNO intends to own.
The danger is comparing a bundled per-SIM fee with a narrow network rate and calling one cheaper. They are not equivalent products. A bundled MVNE proposition may look expensive at low usage but remove fixed costs, integration work and operational exposure. Direct or semi-direct network arrangements can improve unit economics at scale, but they create more supplier management, more systems accountability and usually more cash requirements.
Build the model around the actual commercial perimeter. Identify what the host MNO provides, what the MVNE provides, and what remains with the MVNO. This should include the APN and data breakout arrangement, provisioning, real-time charging, number ranges, SIM logistics, fraud controls, customer support interfaces, roaming management and reporting. A missing responsibility has a cost, even if it does not yet appear in the wholesale rate card.
Separate fixed, variable and contingent costs
Airtime costing becomes manageable when every charge is placed in the right category. Fixed costs are paid regardless of active base or usage. They may include platform licences, minimum monthly commitments, connectivity to the MVNE, support retainers, dedicated account management, number hosting and compliance services. These costs establish the minimum viable subscriber base.
Variable costs move with subscriber numbers or consumption. Typical examples include monthly active SIM fees, domestic voice minutes, SMS, data allowances, excess usage, roaming data, eSIM profile downloads and payment processing. Some costs are truly linear. Others are stepped, with a different rate after a threshold or a bundled allowance that causes effective unit cost to change as usage rises.
Contingent costs are the ones that undermine forecasts. They include porting charges, out-of-bundle debt, premium-rate fraud, SIM replacement, chargebacks, manual customer service contacts, bad debt and early termination liability. A wholesale deal may have an attractive headline price yet still expose the MVNO to disproportionate risk on roaming, fraud or minimum commitments.
A disciplined model tracks all three categories by tariff and customer segment. Consumer prepaid, post-paid SME, travel eSIM and IoT connectivity may all use the same underlying radio network, but their cost structures and cash cycles are materially different.
Model usage, not allowances
Retail tariffs are sold as allowances. Wholesale invoices are paid on consumption and contractual rules. That distinction matters.
A 30GB tariff does not cost 30GB for every customer. Its airtime cost depends on the distribution of usage across the base: customers who barely activate, those who use their included allowance, and the smaller group of heavy users who drive a large share of traffic. The average can conceal a serious issue. If 10 per cent of subscribers consistently consume the full allowance while the rest consume little, a tariff may remain viable. If the heavy-use cohort grows through adverse selection, the same tariff can deteriorate rapidly.
Use cohort-based assumptions rather than a single average. At minimum, forecast inactive or low-use customers, normal users, high-use customers and out-of-bundle users. Add separate assumptions for domestic data, voice, SMS and roaming. For data-led propositions, calculate cost per active data subscriber as well as cost per total subscriber. A large dormant base may make a cost-per-SIM metric look poor while producing healthy contribution from active customers. Conversely, low active usage can hide a fixed-cost problem.
The core calculation is straightforward:
Monthly contribution per customer = retail revenue – variable wholesale usage – variable platform and service costs – payment costs – expected bad debt and support costs.
Then subtract allocated fixed costs to understand operating contribution. Do not allocate fixed costs mechanically and assume the result is permanent. Use the allocation to identify break-even scale, but make commercial decisions using marginal contribution as well. One more profitable subscriber can be valuable even before the business has fully absorbed its fixed platform cost.
Read the wholesale agreement for cost behaviour
Wholesale pricing is not merely a table of rates. It is a set of rules governing how costs behave when the business changes. This is where experienced wholesale teams and MVNO operators spend their time.
Minimum revenue commitments deserve particular scrutiny. They can secure better rates, but only if the volume ramp is credible. A three-year commitment based on optimistic acquisition assumptions is not a discount. It is a liability that can constrain marketing, fundraising and strategic options. Model the downside case: slower activations, lower ARPU, higher churn and lower-than-planned data usage. If the commitment still works, it may be commercially defensible.
Also examine whether minimums are measured on billed revenue, active SIMs, usage, or a combination. Ask how unused bundles are treated, when price reviews occur, and whether rates change after a volume band is reached. Clarify the treatment of zero-use SIMs, suspended accounts, test SIMs and seasonal connections. For travel and IoT propositions, these details can determine whether the model works at all.
Roaming needs its own cost model. Domestic economics should not subsidise uncontrolled international use. Wholesale roaming charges can move quickly, coverage partners vary, and usage controls may not be granular enough for a consumer-facing promise. A sensible approach is to create country groups, set retail policy by group, and define hard controls for high-cost destinations. Unlimited roaming claims are usually marketing decisions with wholesale consequences.
Include the costs outside the airtime invoice
Many early MVNO models understate the operating cost of delivering airtime. The network invoice is visible; the work around it is not.
Customer support is a material variable in low-ARPU propositions. Billing confusion, porting failures, eSIM installation, handset compatibility and coverage complaints all create contacts. If the customer support team cannot see accurate usage, provisioning and network status, contact time rises and first-contact resolution falls. That becomes a margin issue, not merely an operations issue.
Distribution also changes the economics. A digital-only eSIM brand may avoid physical SIM fulfilment but face higher paid acquisition costs and refund exposure. Retail distribution can generate reach but add commissions, stock losses and more complex activation journeys. Enterprise MVNOs may have lower churn and larger contracts, yet require longer sales cycles, solution support and credit control.
Tax treatment, regulatory levies, emergency service obligations, data protection requirements and number porting processes should be captured from the outset. They may not dominate the per-user cost, but omissions create false confidence in the business case.
Price for margin, then test the proposition
The retail tariff should be the result of commercial intent and cost evidence, not a competitor screenshot. Competitor prices are useful because they reveal market expectations. They are dangerous when copied without understanding the underlying customer mix, network deal or cross-subsidy.
Test each tariff under at least three cases: expected usage, heavy usage and adverse selection. In the adverse case, assume that the customers most attracted to the offer are also those most likely to consume its expensive elements. This is especially relevant for unlimited data, international calling, roaming and high-value device propositions.
A tariff with a lower gross margin can still be strategically sound if it improves retention, creates a credible entry price or leads customers to higher-value services. Equally, a high-margin tariff with weak take-up adds little value. The point is to make the trade-off explicit. MVNOs succeed when their proposition and wholesale cost structure reinforce each other.
Treat costing as a live operating discipline
The first costing model is a hypothesis. Once the MVNO is live, replace assumptions with actual activation rates, consumption curves, support contacts, payment failure, churn and roaming behaviour. Review contribution by tariff cohort, acquisition channel and customer segment every month. A blended average across the entire base is useful for board reporting, but it is too blunt to manage commercial decisions.
The strongest MVNOs do not wait for a quarterly finance review to discover that usage has shifted. They set thresholds for data consumption, margin erosion, unusual roaming and support costs, then act quickly through tariff design, fair-use controls, communications or supplier discussions.
Wholesale airtime is not simply a procurement line. It is the commercial architecture beneath the customer promise. Build it with conservative assumptions, negotiate it with a clear view of risk, and keep testing it against real customer behaviour. That is how an MVNO retains the freedom to grow rather than spending its early years financing a tariff it cannot afford.
