How Does SBA Communications Company Actually Work?

SBA Communications sells leases for a specific mounting position on a tower, rooftop, rooftop tower, monopole, or ground site; these tower leasing and colocation agreements let carriers mount antennas, radios, and backhaul gear without building assets. In 2025 SBA reported roughly $3.9 billion in total revenue and lease-related recurring income formed the majority of that figure.

Main customers are national wireless carriers such as Verizon, AT&T, and T-Mobile, plus regional carriers, tower colocators, neutral-host providers for venues, and enterprise customers needing private networks. SBA supports carriers' 5G-Advanced rollouts and preparations for future 6G infrastructure.

Beyond raw space, SBA sells site acquisition, zoning and permitting navigation, network design, structural upgrades, small cell deployment and on-site construction management, plus ongoing tower maintenance and operations. These services reduce carriers' capital expenditure and regulatory burden and speed time-to-service; in 2025 SBA invested approximately $1.1 billion in development and capital expenditures supporting new sites and upgrades.

Customers gain predictable, scalable hosting via long-term leases and colocation agreements, lower upfront capex, and a single counterparty for permitting, construction, and maintenance. This accelerates carrier rollouts-critical for 5G-Advanced coverage densification and small cell deployment-while converting carrier capex into recurring leasing fees for SBA.

Carriers pick SBA for scale, site availability, and operational expertise: SBA operates thousands of towers and rooftop sites across the U.S. and internationally, supports network hosting and backhaul solutions, and offers streamlined colocation processes that reduce time-to-service. The company's ability to manage tower sharing and tenant management makes it hard to replace at scale.

SBA's revenue streams include recurring rent from tower leases and colocation agreements, development fees from new site builds, and ancillary services like structural upgrades and power/backhaul provisioning; in 2025 recurring tenant revenue growth and leasing fees drove the majority of cash flows. For a strategic view, see Where SBA Communications Company Is Going.

Long-term tower and rooftop leases produced roughly $2.62 billion, about 93 percent of SBA Communications total revenue of $2.815 billion in fiscal 2025, driven by high-margin, fixed-escalator contracts that lock in cash flow.

Amendment fees from adding equipment to existing sites are a material secondary source and carry high margins since incremental capital outlay is small; project-based site development and new-site fees provide the remaining, lower-margin revenue.

Leases use multi-year contracts with typical U.S. fixed annual escalators of 2-3 percent and CPI-linked increases internationally; amendment and development fees are one-time or milestone-based charges tied to scope changes.

Scale and tenancy: the number of sites and average tenants per site determine cash flow, plus carrier demand for capacity additions during 5G rollouts and small cell deployments increases amendment activity and development fees.

SBA Communications earns outsized incremental profits from additional tenants because towers are capital-intensive up front and marginal costs are low; with an average of 1.8 tenants per site as of late 2025, incremental margins on new colocation revenue often exceed 80 percent.

Large national tower portfolio, standardized tower leasing and site operations, and mission-critical wireless services drive high retention-historically near 95 percent-which stabilizes cash flows and supports REIT-style AFFO generation.

SBA Communications depends heavily on a few tier-one carriers for the bulk of tower rents; carrier consolidation (for example, lingering effects from the Sprint merger) can raise churn and renegotiation risk, concentrating downside exposure.

Growth via new sites and small cell deployments is sensitive to local zoning and permitting delays; protracted approvals increase capital tie-up and slow rollouts for 5G densification and small cell deployment.