What an ISA actually does, the true cost of hiring one in-house versus outsourcing at $850–$1,500 a month, what to check before you hire, and the honest cases where in-house wins.
By Mohamed Hanafy — Founder, Speed Outsourcing Solutions · previously ran a 200-agent operation for Fantastic Services
Every agent knows the pattern: leads come in from Zillow, your website, sign calls, and sphere referrals — and the ones that don't get a call inside five minutes go cold. The fix has a name, the Inside Sales Agent, and a decision attached to it: hire an ISA in-house at $4,500+ a month fully loaded, or outsource the role at $850–$1,500. This guide walks through both sides of that math, what to look for if you outsource, and the cases where in-house is genuinely the right call.
An ISA is the dedicated phone-and-follow-up layer between your lead sources and your closers. The core job list:
An in-house US ISA earns $45,000–$65,000 a year in base salary plus bonuses per appointment or per closing. Add payroll taxes, benefits, software seats, dialer costs, recruiting, and the management time to train and supervise them, and the loaded cost lands around $4,500+ per month — before you account for the industry's brutal ISA turnover, which regularly forces you to restart the whole hiring-and-training cycle inside a year.
| Option | Monthly cost | What's included |
|---|---|---|
| In-house US ISA | $4,500+ loaded | $45k–$65k salary + taxes, benefits, tools, recruiting, your management time |
| Outsourced dedicated ISA (offshore) | $850 – $1,500 | Dedicated agent, team leader, QA scoring, call recordings, reporting |
| US ISA agency / per-appointment services | $2,000 – $4,000+ | Varies widely; watch per-appointment incentives and shared-agent models |
2026 market ranges for a full-time dedicated ISA function. Per-appointment pricing looks cheap per unit but rewards booking volume over booking quality.
The outsourced seat is roughly a third of the loaded in-house cost, and — just as important for a solo agent or small team — it converts a hiring project with recruiting risk into a month-to-month service that is live in about 7 days, from 2 seats, with $0 setup. Run your own comparison on the savings calculator.
One ISA seat handling speed to lead, nurture, and appointment setting frees roughly 15–20 hours of your week for appointments and closings. This is the most common starting point: one dedicated person at $850–$1,500 a month, working your lead flow in your CRM.
Teams typically split inbound and outbound: one ISA on new-lead response and nurture, one on outbound prospecting, feeding several agents' calendars under one QA framework. From 2 seats you get coverage across more hours and no single point of failure.
Acquisition-side calling is a different skill set — cold lists, motivated-seller qualification, offer-range conversations — usually run in REsimpli or a similar investor CRM with a dialer. The seat economics are the same $850–$1,500 band; the difference is script depth and list strategy. More on this vertical in our real estate call center outsourcing guide.
Honesty helps here, because outsourcing is not always the answer. Hire in-house when your ISA needs to attend office meetings and shadow closers daily as part of a path to a licensed agent role; when your market's callers react badly to any non-local accent and you have tested this rather than assumed it; or when you have the volume and management bandwidth to run a multi-ISA in-house pod and want that capability as a permanent asset of the business. An outsourced seat is the better fit when the problem is cost, coverage hours, hiring risk, or simply that nobody is calling the leads today.
If you are weighing offshore destinations for the role, the Egypt vs Philippines comparison covers accents, time zones, and rates in detail; full seat pricing is on the pricing page.
An outsourced dedicated ISA costs $850–$1,500 per month in 2026, including the agent, team leader supervision, QA call scoring, recordings, and reporting — versus roughly $4,500+ per month fully loaded for an in-house US ISA on a $45,000–$65,000 salary. Engagements run month to month with $0 setup, live in about 7 days.
An ISA calls new leads within minutes, qualifies motivation, timeline, and price, runs long-term nurture on 6–24 month prospects, prospects outbound lists, and books qualified appointments onto the closer's calendar — all logged in your CRM. For investors the same role covers motivated-seller lists and acquisition qualification instead of buyer and listing leads.
Yes — a properly run outsourced ISA works logged into your own Follow Up Boss, kvCORE, or REsimpli instance, logging every call, updating stages, and booking appointments in your system so your data and nurture pipeline stay yours. Avoid providers who route your leads through their own portal instead of your CRM.
In-house wins when the ISA role is a training ground for future licensed agents, when tested (not assumed) local-market response demands a local caller, or when you have the volume and management capacity to build a permanent multi-ISA pod. If the constraint is cost, coverage hours, or hiring risk, the outsourced seat at $850–$1,500 usually wins.