SOI vs. Purchased Leads: Cost per Closing Compared

Are sphere of influence leads better than purchased leads?

On cost and conversion, yes. Sphere leads cost close to nothing to acquire and convert at a meaningfully higher rate, according to a 350-team survey covered by HousingWire. The honest tradeoff runs the other direction: a sphere takes years to build and will struggle to fix an empty pipeline this month, while a purchased lead is available today at a real dollar cost. Both facts hold at once, and the rest of this post works through the actual numbers on each side.

Purchased lead: a prospect an agent pays a platform or advertiser to generate, as opposed to a sphere of influence contact, who already knows the agent before any money changes hands.

How much does a purchased real estate lead actually cost?

Cost varies widely by source, and the specific figures circulating in marketing blogs mostly trace back to SEO-agency content rather than a single named, dated primary study, so this post won't repeat an unsourced "$400 average cost per lead" figure as fact. What can be said with a source: RealScout, Tom Ferry, and T3 Sixty's 2026 Teams Report, as covered by HousingWire, put sphere and database leads at $0 acquisition cost against a 10 to 20x ROI, drawn from 350 responding real estate teams (HousingWire, 2026). That figure describes the sphere side of the comparison directly. Portal and PPC lead costs vary by market and platform enough that a single blended number would mislead more than it clarifies, so treat any specific cost-per-lead figure you see elsewhere as platform-specific, and verify it against that platform's own published rate card before using it in your own math.

What does a sphere of influence lead cost instead?

Near-zero in cash and real in time. Acquisition cost sits close to $0 per the survey above, since a sphere contact already exists in your network rather than being purchased from a third party. The actual cost shows up as agent time: the calls, texts, and follow-up that keep a relationship warm over years. A sphere that gets no attention produces nothing, so calling this channel "free" understates what it actually requires, which is consistent, scheduled effort instead of a line-item expense on a marketing budget.

Why do sphere leads convert at a higher rate?

Trust already exists before the first conversation about buying or selling even starts. NAR's 2025 Profile of Home Buyers and Sellers found 66% of sellers found their agent through a referral or an agent they'd worked with before (NAR, 2025), a relationship a purchased lead simply doesn't start with. A purchased lead has to be convinced you're trustworthy before they'll book a call. A sphere contact already knows you, and that head start is the entire reason the conversion math tilts so heavily toward the sphere side once real trust is in place.

What's the real downside of relying on your sphere alone?

Time. A sphere takes years of consistent contact to build into something that produces steady transactions, and an agent with three months of runway and an empty pipeline doesn't have years to wait. Sphere marketing compounds, meaning the tenth year of consistent touches produces far more than the first, but that compounding curve is exactly the problem for an agent who needs a closing this quarter. Purchased leads exist for a reason: they convert a dollar into a prospect on a timeline measured in days, something a two-year-old sphere genuinely struggles to do.

Picture two agents starting the same month. One spends a marketing budget on portal leads and closes a transaction within 60 days, at a real, visible cost. The other starts a weekly sphere cadence from a list of 80 people and closes nothing in that same 60 days, because nobody in an 80-person sphere happens to be moving yet. Both are making the right call for their situation. The portal-lead agent is buying speed at a real price; the sphere-building agent is buying a compounding asset that will eventually cost less per closing than any portal ever will, once the list and the cadence both mature.

How does the actual cost per closing compare?

Lead source	Typical acquisition cost	Typical conversion pattern	What the agent actually pays
Sphere / referral	Near $0 (HousingWire, 2026)	Higher, driven by pre-existing trust	Agent time and consistent cadence
Portal / ILS leads	Varies by platform; verify against the platform's own rate card	Lower per lead, higher volume	Cash, plus follow-up time
PPC / social ads	Varies by campaign and market	Lower still without a strong nurture sequence	Cash and ongoing ad management time

Every row above is directional. The sphere figure carries a named, dated source. The portal and PPC figures are left as "verify against the platform" rather than a specific dollar number, because the widely repeated cost-per-lead figures for those channels don't trace back to a primary source this post could stand behind.

Does that mean agents should stop buying leads entirely?

No. Sphere is the higher-ROI channel over a multi-year horizon, and a mixed strategy is often the rational move for an agent with an empty pipeline today. A brand-new agent without a built sphere yet has a real, immediate need for transactions, and a purchased lead can fill that gap while the sphere gets built in parallel over the following one to two years. The practical answer is sequencing: run purchased leads to bridge the near-term gap while simultaneously working the sphere-building steps that compound later, rather than treating the two channels as a permanent either-or choice. Agents who've been in the business for a decade tend to let the purchased-lead spend shrink on its own as the sphere grows, simply because the sphere starts producing enough on its own that the marginal dollar spent on portal leads stops paying for itself the way it once did.

How do you calculate your own cost per closing from your sphere?

Multiply your sphere size by the national annual mover rate (11.8% per the Census Bureau's 2024 release), then by the 66% referral-or-repeat share NAR reported for 2025. A 300-contact sphere lands around 23 touched transactions a year using those two rates. Divide the hours you spend on sphere cadence across those transactions and you have a real, if rough, cost-per-closing figure to weigh against whatever a purchased lead is running you this quarter. The database you already have but aren't working is usually the fastest place to find that sphere, before spending anything on a new one.

Real Estate on Purpose built the sphere of influence system because this comparison kept landing the same way across agent after agent. The highest-leverage lead an agent already owns is usually the one sitting untouched in their own contacts. Agents rarely have a lead problem; what they usually have is a follow-through problem with the leads already in front of them, worked through a real weekly cadence like the one outlined here. The database sitting in a phone is worth more than most agents assume before they actually run the numbers on it, and it's usually the fastest, cheapest inventory an agent has access to on any given week.

Calculate your own numbers to see what your sphere is actually worth before you decide where the next marketing dollar goes.