What staff augmentation costs per developer per month

Key takeaways

• A staff augmentation model prices each developer as a bill rate multiplied by about 173 hours, the monthly share of a 2,080-hour year. As of October 2026, KORE1's US onshore bands put a mid-level software developer at $12,500 to $19,900 a month and a senior software engineer at $18,700 to $27,700.
• The bill rate carries three things: the builder's pay, the employer's payroll burden and the vendor's margin. KORE1 puts the normal markup over pay at 35 to 50 percent for onshore IT work, and in its worked example the vendor's margin is 19 percent of the bill rate.
• The contract model changes the invoice more than the label does. Time and materials bills hours, a monthly retainer bills a fixed amount for committed hours, and fixed price is project work. A.Team's monthly retainer runs 5 to 15 percent below the equivalent hourly rate.
• Terms outside the rate often decide the real cost: conversion fee, minimum term, notice period, replacement, payment terms and whether a management layer is priced as its own line.
• A.Team's standard structure is one all-in rate per builder on the service order, with no managing-partner fee and no success fees. The published floor for a senior US React contractor is $100 an hour.

Why this question matters

You have a proposal with a monthly number on it, and the first question in the room is whether the number is fair. A fair number is one you can rebuild from three inputs: a bill rate, the hours in a month, and the lines the vendor adds on top. Most published pages give you an hourly range and stop.

This guide converts the ranges into monthly figures as of October 2026, takes a bill rate apart, and lists the terms outside the rate that move the total. The market numbers come from KORE1, a US staffing firm that publishes its bands and discloses that it earns fees from placements. The A.Team figures are our published floor and ceiling, stated as such.

The frame: Rate, hours and layers

Monthly cost per developer is the bill rate times the billable hours in a month, plus any layer the vendor prices separately. KORE1 uses roughly 173 billable hours, which is 2,080 hours a year divided by twelve. Every monthly figure in this guide uses that number, so you can swap in your own hours for a part-time seat.

Inside the bill rate sit three lines: what the builder is paid, the employer's payroll burden, and the vendor's margin. Outside it sit the layers that show up as their own lines or their own events: a management layer, a conversion fee when you hire the builder, and any one-time fee the vendor calls onboarding or platform access. The job is to know which of those are inside the number you were quoted.

What does a staff augmentation model cost per developer per month?

As of October 2026, a senior US software engineer placed through a staffing firm bills $108 to $160 an hour, which is $18,700 to $27,700 a month on KORE1's onshore bands. A mid-level developer runs $12,500 to $19,900 and an AI or ML engineer $24,200 to $41,500. A.Team's published floor of $100 an hour for a senior US React contractor works out to $17,300 a month on the same 173 hours.

Monthly cost by role for IT staff augmentation, US onshore, as of October 2026:

Three things to read off the table. The spread inside a single role is wide: a data engineer's monthly cost differs by more than $11,000 between the bottom and top of the band, so the useful question is where your seat sits in the band. The A.Team row starts inside the senior band and tops out at the architect tier; it's a floor and a ceiling rather than a price list, and the rate on a service order depends on the builder and the scope. And these are onshore figures. KORE1 puts nearshore Latin America 40 to 55 percent below its onshore rates, so before you compare a nearshore quote to this table, ask which country the builder works from and how many hours overlap with your team.

KORE1 says its bill rates already include background checks, workers' compensation and the agency's own benefits load, so those are not extra lines on top of the monthly figure. For per-role rate detail, see the guides for AI engineers, fullstack engineers, DevOps engineers, data engineers and React developers.

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What is the markup in a staff augmentation bill rate?

Staffing firms mark up a contractor's pay rate by 35 to 50 percent for onshore IT work, on KORE1's cost-to-hire page. Part of that markup is the employer's payroll burden, so the markup and the vendor's margin are different numbers.

KORE1 shows the arithmetic in a worked example on its contractor hourly rates page. A $220 bill rate breaks down as $150 of contractor pay, $28 of employer payroll burden and $42 of agency margin, which is about a 47 percent markup over pay and puts the margin at 19 percent of the bill rate. At 173 hours, that single seat costs $38,060 a month. The builder's pay is $25,950 of it, the payroll burden $4,844 and the margin $7,266.

That last figure is the one worth carrying into a negotiation. Each 10 points of margin on a $150 pay rate is $15 an hour, or $2,595 a month per builder, which is $31,140 a year on one seat. If a vendor discloses the pay rate you can see the margin, and if it quotes one number you can compare the number but not the lines, so ask what the rate includes. A.Team quotes one all-in rate per builder on the service order, with no hidden tiers or success fees, and the same question applies to us: what's inside the all-in rate?

Pricing questions to ask every vendor has the full list, including the take-home-rate question that surfaces embedded margin.

Time and materials, monthly retainer or fixed price?

Staff augmentation bills either time and materials or a monthly retainer. Fixed price is a different product: the vendor owns the scope and every change is repriced, which makes it project work. The three differ in what you commit to and who carries the risk of the hours.

The retainer is where a commitment buys a discount. A.Team's monthly retainer runs 5 to 15 percent below the equivalent hourly rate. On the $100 floor at 173 hours, that's $14,705 to $16,435 a month instead of $17,300, illustrative arithmetic and not a quote. KORE1 cites 5 to 12 percent off for twelve months of guaranteed hours, so the discount is in a similar range even where the commitment length differs.

What belongs in a staff augmentation contract?

A staff augmentation contract should settle six things before the first invoice, because each one changes the cost of a month or the cost of leaving.

• Term and notice. The minimum commitment, and how much notice you owe to ramp down or end the seat. A retainer discount usually comes with a minimum.
• Conversion. What it costs to hire the builder directly. KORE1 cites 15 to 25 percent of first-year salary, declining the longer the contract has run. A.Team charges a conversion fee if you hire the builder full-time, so ask for the formula in writing.
• Replacement. How fast the vendor swaps a builder who isn't working out, and with whom. A.Team replaces with substantially similar experience and skills, fast.
• Payment terms. Net days, and what a late payment costs. A.Team's client-side terms are Net-15.
• Rate changes. Whether the rate holds for the term, and what triggers a change.
• Management line. Whether any separately priced management or account layer sits above the builders.

The first five are one clause each. The sixth is a structural question, and it's where the same builder can cost very different amounts a month.

Where does the engagement model put the fee?

The fee lands in one of three places, and each puts a different number on the invoice. In a self-managed engagement you direct the builder day to day, the price is per builder, and a Team Success contact runs kickoff and stays reachable. An embedded lead engagement sends a team with a senior lead inside it, in a builder seat, with no separate management layer or fee. In managed delivery, a managing partner or account layer sits above the engagement and is priced as its own layer.

The managed-delivery layer is the line to look for when two quotes for the same builder differ by thousands a month. Standard A.Team engagements carry no managing-partner fee: one MSA, each builder on their own service order. Individual contractors vs. managed teams covers when the managed layer earns its price and when it doesn't.

What does a team cost over six months?

Three senior engineers for six months, on KORE1's senior band of $18,700 to $27,700 a month, cost $336,600 to $498,600. That's a public-band illustration, not a quote from anyone, and it excludes anything that sits outside the bill rate.

Two of those exclusions are worth pricing before you sign. A conversion fee applies if you hire any of the three, and its size depends on the formula in the contract. A management layer applies if the vendor prices one. Then compare the result to the employee alternative: contractor vs. FTE total cost puts the crossover where an employee becomes cheaper at twelve to eighteen months of sustained full-time work, so a six-month engagement sits well inside the range where the contractor wins on total cost. If the work will run past that crossover, price the conversion path at the start.

What to do next

Before you compare quotes, ask each vendor for four numbers: the bill rate, the pay rate or a statement of what the all-in rate includes, the hours the monthly figure assumes, and the conversion fee. Divide the bill rate by your hours to get the monthly figure, and put it next to the band for the role. If a number sits outside the band, ask what is different about the builder or the lines. If a number can't be rebuilt from its parts, treat it as a bundle and price the parts separately.

If the seat is senior and needs to start this quarter, A.Team returns a matched shortlist within 72 hours of the scoping call, priced at one all-in rate per builder on the service order. Hire Expert Talent.