For a CPA firm, the case for outsourcing usually opens with cost. A vendor promises a percentage saved, the partner nods, and nothing actually changes. The percentage is the wrong place to start a cost-savings case study, because the number that governs your firm is not how cheap a seat is. It is how much finished, signable work each dollar buys.
Here is the version that matters. One firm we staffed saved close to $420,000 a year, with no local hire added, and the cost line was the least interesting thing about it.
That firm's real win was time: the hours its partners stopped spending on review and got back for clients. Cost is the entry ticket to that outcome. It is not the prize. The engagements below show what the saving looked like in real numbers, and what it bought.
How much does outsourcing actually save a CPA firm?
Outsourcing saves a firm the gap between what a US seat truly costs and what trained offshore capacity costs to produce the same reviewed work. The honest way to size that gap is to price the seat you already run, in full, and then compare it to output rather than to an hourly rate.
Price the seat you already run, in full
Start with the salary, which is the part everyone quotes. The median US accountant earns $81,680 a year, with the lowest 10% earning under $52,780 and the top 10% above $141,420 (U.S. Bureau of Labor Statistics, May 2024). And US firms are hiring into a shortage: BLS projects about 124,200 openings for accountants and auditors a year, on average, over the decade, which keeps senior talent scarce and expensive.
Salary is only the visible part of the bill. Across private industry, benefits run 30.1% of what an employer actually spends per worker, with wages and salaries the other 69.9% (BLS employer-cost data, March 2026). Recruiting, software seats, workspace, and the cost of replacing someone who leaves sit on top of that.
Suppose a firm hires one staff accountant at that $81,680 median. Add the employer benefit load alone, and the salary grosses up to roughly $117,000 in total compensation, before the firm spends a dollar on recruiting, a software seat, a desk, or the turnover that follows a departure. Those figures are illustrative rather than a quote, but the shape holds: salary understates what a US seat costs a firm, and each of those extras pushes the real bill higher still.
An hourly rate is the wrong yardstick
An hourly rate on either side is the wrong unit for this decision. Priced by the hour, the median US accountant's wage is $39.27 (U.S. Bureau of Labor Statistics, May 2024), before a firm loads benefits, recruiting, or turnover on top. Offshore preparation is cheaper by the hour, and that discount is real, but a cheaper hour is not the same as a cheaper finished return. What governs a firm's bill is how much reviewer time each finished file consumes, not the rate on either seat.
Why cost per reviewed return is the number that matters
Now the part that decides the answer. The cost that governs how much work a firm can take on is the cost per reviewed return: how many licensed-reviewer hours each finished file consumes before it can be signed. Outsourcing pays when it lowers that number, and it backfires when cheaper preparation produces files that swallow more of a partner's time in rework than the seat ever saved.
Case study: a 42% cost reduction on the same workload
One CPA firm came to us eight placements into a busy season it could not staff on its own. Working with our team on the same book of work, it cut its cost of production by 42%, with no local hires added. Its own reviewers put it plainly: the workpapers were better than what the firm had produced in-house.
That 42% came from the difference between carrying that volume as loaded US seats and producing the same reviewed output through a trained offshore team under the firm's own review chain. It reflects a real change in the cost of production, not a cheaper line on a rate card. The saving showed up because the work stayed inspectable, so a partner's time went to signing finished files instead of re-doing them.
Case study: $420,000 saved and 60% less partner review time
A regional firm, 12 placements deep with us, saw its throughput and its cost move together. Its return volume roughly tripled, a 3x jump, in a single season. With our team carrying preparation under the firm's SOPs, the firm cut partner review time by 60%, delivered 100% of that volume on time, and saved close to $420,000 a year, without adding one in-house seat.
Read the middle number first. Partner review time falling 60% is the reason the cost number exists. When files come back inspectable, a licensed reviewer confirms correct work in minutes, where flawed files would have cost hours of correction, and the hours that frees are worth more to a firm than the rate on any seat.
Case study: two busy seasons cleared without a local hire
Not every saving shows up as a dollar figure. For seasonal firms the saving is capacity that arrives and leaves on schedule, so nobody is paid to idle through the trough. A tax-focused firm we staffed cleared 310 returns in 10 weeks and handed roughly 200 senior hours back to its partners. A mid-size firm running white-label tax delivery through us cleared 600 returns in 12 weeks at 100% on-time delivery and freed 25 hours a week of its own people's time.
Since 2022 we have placed trained offshore accountants and tax preparers across 20+ US firms and 30+ placements, and the pattern repeats. The firms that measure the result well track the senior hours they get back, because that is the input a busy season actually runs out of.
Why are cost savings the entry ticket, not the prize?
Cost savings get a firm in the door, but the prize is what the reclaimed hours let it do next. Every result above is a cost outcome, and cost is the easiest part of the case to make. The harder, more valuable shift is that a partner who stops spending nights on review can finally accept the work the firm was turning away.
Be honest about what outsourcing does not save, because that is where firms get burned. It does not cut the work that needs a partner's judgment: novel positions, first-year complex clients, and advisory conversations stay in-house, because reasoning does not delegate. And a badly run offshore team can cost a firm more than the seat it replaced, when its files come back needing heavy rework. The saving is real only when the work stays inspectable and one review chain covers it.
Confidentiality is the objection a partner raises next, and it deserves a straight answer. Under Internal Revenue Code section 7216, a preparer must obtain the client's knowing, written consent before tax-return information is disclosed to a preparer located outside the United States, and unauthorized disclosure is a federal crime (eCFR). The firm stays the preparer of record, so the controls that matter are consent, restricted access, and a single review chain that keeps client data on one accountable path.
We built the Free 40-Hour Proof Pilot for exactly this decision. It is a fixed 40-hour block of your own representative work, prepared by our offshore team on your software and SOPs, put through our multi-layer review, and graded by your own reviewer before a single client file is committed. The trial is free, and its purpose is proof, on your own work, before you commit to anything. If a placement is not the right fit in the first 30 days, we replace them free, from our bench or recruited to your spec. That is the 30-Day Fit Guarantee.
If you are a firm carrying this volume, put it to the test. Start a Free 40-Hour Proof Pilot and let your own reviewer grade the work before a single client file is committed.
Frequently asked questions
How much can a CPA firm save by outsourcing accounting work?
The saving depends on the work, not a headline percentage. Firms we have staffed cut the cost of the same book of work by roughly 42% and, in one case, saved close to $420,000 a year without a local hire. The real driver is that a US seat costs well beyond its salary once benefits and turnover are loaded on, and that inspectable offshore work frees a partner's review time.
Is outsourcing cheaper than hiring an in-house accountant?
Per-seat price is the wrong unit for a firm. What you actually buy is finished work a licensed reviewer can sign, and reviewer time is the scarce input. A cheaper preparer whose files need heavy correction can cost your firm more than a pricier one whose files pass on the first read, so model cost per reviewed return rather than cost per hour.
What does a US accounting hire actually cost a firm?
A US accounting hire costs a firm well beyond its salary line. The median US accountant earns $81,680 a year (U.S. Bureau of Labor Statistics, May 2024). Benefits add roughly another 30.1% of total compensation on top of wages, per BLS employer-cost data, before you count recruiting, software, and turnover.
Do these case study results transfer to a smaller firm?
The mechanism transfers even when the headline number does not. Solo and small firms we work with usually start with one dedicated preparer and scale seat by seat, so a two-partner practice can free senior hours the same way a regional firm does. What carries over is the review chain that protects your signature, not a specific dollar figure.
Is client tax data safe when preparation is handled offshore?
Client tax data can be handled offshore safely, and US tax law sets the floor for how. Under Internal Revenue Code section 7216, a paid preparer must get the client's knowing, written consent before tax-return information goes to a preparer outside the United States, and unauthorized disclosure is a federal crime (eCFR). The firm stays the preparer of record, and Accountably works under SOC 2-aligned and ISO 27001-aligned controls, NDA-backed confidentiality, role-based access, encrypted file exchange, and zero local storage, with one review chain over every file.
What is a proof pilot, and how does it de-risk the cost decision?
A Free 40-Hour Proof Pilot is a fixed 40-hour block of your own representative work, prepared by our offshore team on your software and SOPs and graded by your own reviewer before any client file is committed. It lets a firm see real output on real work, so the cost case rests on evidence rather than on a promise.