An offshore staffing cost calculator is only as good as the assumptions buried inside it. Most of these tools are published by companies that sell offshore staffing, pre-filled with a salary you did not choose and a saving percentage you cannot audit.
Half the calculation does not have to be taken on faith. Federal wage, benefit and payroll tax data prices the seat you would otherwise employ, down to the hour, and you can pull every row today. Price both sides yourself and the percentage stops being somebody else's number.
What These Calculators Actually Compute
Every one of these tools computes the same difference, whatever the interface looks like. On one side is the loaded annual cost of the seat you would otherwise employ. On the other is everything the offshore arrangement costs you, which is the provider's fee plus the work that never leaves your firm.
The unit matters more than the interface. Put both sides in cost per productive hour on your work, because that is the only unit in which a monthly seat fee, an hourly rate and a per return price can be compared at all. A tool that reports an annual saving without showing the hours behind it has skipped the step that decides the result.
Side One: The Inputs You Can Look Up
Which Role Are You Actually Replacing?
The role you are modeling moves the answer more than any other input, and a pre-filled salary box makes that choice for you. Federal wage data lets you set the row honestly for the seat you would actually hire.
| Role | Median hourly wage | Mean annual wage |
|---|---|---|
| Accountants and auditors | $40.23 | $94,750 |
| Bookkeeping, accounting, and auditing clerks | $24.36 | $53,560 |
| Source: BLS, Occupational Employment and Wage Statistics, May 2025, national estimates across all industries. |
Tax preparers sit between the two, with a mean annual wage of $60,930 in the same survey (BLS, Occupational Employment and Wage Statistics, May 2025). Read all of these as a reference band rather than an offer letter. They are national figures across every industry that employs the occupation, so a firm in a high cost metro will sit above them and a rural practice may sit below.
The Hours Divisor Decides More Than the Wage
Annual wage figures carry an assumption worth making explicit. The annual column is calculated, not collected: the Bureau of Labor Statistics multiplies the hourly mean wage by a year-round, full-time figure of 2,080 hours (BLS, Occupational Employment and Wage Statistics, May 2025, table 1 footnote). That is also why the two columns above do not reconcile. One is a median and the other is a mean, so annualizing the median hourly wage will not reproduce the published annual figure.
Your firm does not buy 2,080 productive hours. It buys what is left after paid leave, training, meetings, administration and the weeks when the work is thin. Take the productive hours figure from your own time records, apply it to both sides, and the comparison stops flattering whichever side you were hoping would win.
Benefits Are a Share of the Seat, Not a Markup on Pay
Benefits are the row partners skip when they compare a salary to an hourly rate. For private industry workers in March 2026, benefit costs averaged $14.01 per hour worked and accounted for 30.1% of total employer compensation costs, with wages and salaries accounting for the other 69.9% (BLS, Employer Costs for Employee Compensation).
That is a share of total compensation, not a markup on pay. Treat pay as 69.9% of the seat and gross up from there. A firm that instead adds a benefit percentage on top of salary understates its own seat, and understating your own seat is the error that makes any vendor's tool look generous. That share also moves with the wage. In the same release, private industry benefit costs were $3.18 per hour worked at the 10th wage percentile and $29.31 at the 90th, against wages and salaries of $14.88 and $60.39 at those same percentiles (BLS, Employer Costs for Employee Compensation). A lower paid seat carries a lighter benefit load than the national average implies and a higher paid one carries a heavier load, so use 69.9% to get started and replace it with your own benefit lines as soon as you can pull them.
The Payroll Taxes You Can Price, and the One Your State Sets
Two of the employer payroll taxes are fixed rates you can price today. The employer pays 6.2% for Social Security on wages up to the base limit, which is $184,500 for 2026, plus 1.45% for Medicare on every dollar with no wage limit (IRS, Topic no. 751).
Unemployment insurance has a federal floor and a state variable. The federal unemployment tax is 6.0% on the first $7,000 of wages paid to each employee in a calendar year. Employers who pay their state unemployment taxes on time receive an offset credit of up to 5.4%, so employers in states not subject to a credit reduction generally pay 0.6%, a maximum of $42.00 per employee per year (US Department of Labor, Unemployment Insurance Tax Topic).
The state row is one you have to fetch yourself. State law determines individual state unemployment insurance tax rates, and the taxable wage base is set state by state, so a default in a calculator cannot stand in for the rate your firm actually pays (US Department of Labor, Unemployment Insurance Tax Topic).
One caution before you stack these rows. The national benefit measure already carries legally required benefits as one of its components, so a firm that grosses pay up by that share and then adds Social Security, Medicare and unemployment tax on top risks counting the same money twice. In the same release, legally required benefits cost private industry employers $2.75 per hour worked at the median wage percentile, inside a total benefit cost of $10.63 (BLS, Employer Costs for Employee Compensation). Use the national share as a cross check, or build the load from your own benefit lines, but not both.
Side Two: The Offshore Inputs No Public Dataset Prices
No government dataset prices an offshore accounting seat. That side of the calculation is a commercial quote, which means the input is not a number to look up, it is a set of terms to get in writing before any number means anything. Ask for these eight, and price each one.
- The rate and its unit. Per hour, per seat per month, or per return. Whichever you are given, convert it to cost per productive hour on your files, because that is the unit the local side is already in.
- The hours the fee buys, and the calendar they are worked against. Public holidays observed in the provider's country can be days you are not staffed. Count them before your March schedule assumes otherwise.
- Who legally employs the person. The answer decides who carries local statutory employer costs, who runs payroll and termination, and who you are contracting with when something goes wrong.
- What the management fee covers. Recruiting, supervision, workspace, hardware, connectivity and payroll administration are either inside the fee or billed to you later. A fee that carries all of them is not comparable to one that carries none.
- Software licenses. Extra users in your tax and workflow software are your cost unless the contract says otherwise. Count them per user before you sign, because per seat licensing can absorb a real share of the rate difference.
- The ramp. How many weeks pass before output is usable, whether those weeks are billed, and who does the training. Ramp is a first year cost that no calculator's output carries.
- Replacement and notice terms. What happens when a placement is wrong, how fast a replacement arrives, and what handover looks like when someone rolls off.
- Security and data handling obligations. Where files sit, who can reach them, and what the provider is contractually required to maintain.
Any figure a calculator hands you before those eight answers exist is a guess with a currency symbol in front of it.
Four Assumptions Buried Inside a Vendor's Offshore Staffing Cost Calculator
The country on the local side. Many of these tools are built for Australian, New Zealand or United Kingdom hiring, and their local column prices that country's employer costs. If the local side is not built from US wage, benefit and payroll tax rules, the difference on screen is not yours.
Which costs sit on which side of the ledger. Office space, hardware, connectivity and payroll administration are often loaded onto the local seat and then described as included on the offshore side. The same line widens the gap twice.
The hours divisor. A monthly fee divided by contracted hours looks cheaper than the same fee divided by the hours actually worked on your files. Ask which one the tool used, because a fee spread over contracted hours understates what each usable hour costs you.
What the percentage is a percentage of. A saving quoted against base salary is a larger number than the same saving quoted against loaded cost, and larger again than one quoted against total program cost with retained review included.
One more thing every version of these tools leaves out. None of them subtracts the review time that stays in your firm, because the provider's rate does not buy your reviewer, and your reviewer is the reason the work becomes signable.
The Arithmetic, Written Out
Build it in a spreadsheet in this order, and keep the two sides in the same units all the way down.
``` A. Loaded in-house seat, per year base pay your band x hours you pay for + benefit load your own benefit lines, or gross pay up as 69.9% of total compensation (BLS ECEC) + employer taxes 6.2% to the wage base, 1.45% Medicare (IRS), FUTA 0.6% after credit, state UI per your state (skip this row if the benefit load already carries it) + seat costs software seats, workspace, hardware, recruiting = A
B. Offshore capacity, per year provider fee rate x hours contracted + retained review reviewer hours x your blended cost per hour + ramp one time, taken in year one + extra licenses per user, in your software + compliance admin consent, vendor due diligence, security review = B
Cost per productive hour A / productive hours vs B / productive hours Year one difference A - B ```
The illustration below uses one role from the wage table and two inputs you have to supply yourself, so the arithmetic stays visible.
``` Illustration, stated inputs only
Seat modeled one bookkeeping, accounting and auditing clerk Base pay $24.36 per hour (BLS median, May 2025) Hours you pay for 2,080 (BLS year-round, full-time figure) Benefit load pay is 69.9% of total (BLS national share, standing in for your own benefit lines) Productive hours 1,700 (your number, not a benchmark)
Total compensation per hour 24.36 / 0.699 = $34.85 Loaded seat per year 34.85 x 2,080 = $72,488 Cost per productive hour 72,488 / 1,700 = $42.64
Software seats, workspace and recruiting are not in this illustration. Add them and the number rises again. The BLS benefit share is measured per hour worked, not per hour paid, so treat the result as an estimate. ```
Run it and the cost per productive hour lands well above the wage row you started from. That gap, not the wage, is the local side of an honest comparison.
The Compliance Lines the Calculator Leaves Out
Two rules turn into hours, and hours are cost. A tax return preparer may not disclose or use a taxpayer's tax return information without the taxpayer's written consent unless section 7216 or § 301.7216-2 specifically authorizes the disclosure or use, and the consent must be knowing and voluntary (eCFR, Treasury regulations under section 7216).
The second rule catches firms in February. A preparer located within the United States may not obtain consent to disclose a taxpayer's Social Security number to a preparer located outside the United States for a return in the Form 1040 series, unless the disclosure runs through an adequate data protection safeguard as defined by the Secretary in published guidance and the preparer verifies that the safeguard is maintained in the request for consent (eCFR, Treasury regulations under section 7216). That leaves two routes: mask or redact the number before the file moves, or operate the safeguard and verify it in the consent request.
Vendor oversight is a written obligation as well. The FTC Safeguards Rule requires a covered firm to take reasonable steps to select and retain service providers capable of maintaining appropriate safeguards, to require those safeguards by contract, and to periodically assess the provider based on the risk it presents and the continued adequacy of its safeguards (eCFR, FTC Safeguards Rule, section 314.4).
Put all three in the model as hours: engagement letter revisions, consent collection and tracking, due diligence before signing, and a reassessment each year. They are small next to the rate difference, and they arrive on a deadline, which is the combination that makes firms pay partner rates for them in March.
Questions Firms Ask Before They Trust the Number
How Accurate Is an Online Offshore Staffing Cost Calculator?
About as accurate as the assumptions you cannot see. Treat the output as a hypothesis, then rebuild it with your own pay band, your own productive hours, your own benefit lines and a quote tied to a written scope. A tool that will not show its inputs is marketing with arithmetic attached.
What Should an Offshore Staffing Fee Include?
Ask for the itemization rather than the adjective. Recruiting, supervision, workspace, hardware, connectivity, payroll administration and tooling should each be named as included or excluded. Two fees far apart on paper often differ only in what one of them leaves for you to buy.
Who Legally Employs Offshore Staff?
It depends on the model, and the contract has to say so plainly. In a staffing or managed team arrangement the provider employs the person and you direct the work under your own review, while in an employer of record arrangement a third party holds the employment relationship. The answer moves who carries local statutory costs and who bears termination risk, so it belongs in the calculation rather than in the footnotes.
What Saving Percentage Should a Firm Assume?
None. A percentage is an output, not an input, and every published range comes from someone with a position in the answer. Build both sides from your own numbers, then read the percentage off your own result.
The Prize Is Capacity, Not the Payroll Line
The calculation worth acting on is the one you built: your pay band, your productive hours, your benefit lines, a quote tied to a written scope, and the review hours you already know will not move. If the difference comes out thin, the answer is usually a narrower scope rather than a different provider. If it comes out wide, the prize is rarely the payroll line you shrank, it is the work you can now accept.
Then test the arithmetic on real files before you commit to it. Accountably has placed 30+ trained offshore accountants and preparers inside 20+ US firms since 2022. The Free 40-Hour Proof Pilot runs a fixed block of your own work on your software and your process, under full review, so your reviewer grades real output before a client file depends on it. If a placement is not a fit in the first 30 days, we replace them free.