Job title is the wrong unit for this decision, and output is the better test. The accounting tasks to outsource are the ones that produce a record a reviewer can check against a source document, a coded transaction, a reconciled account, a drafted return, a closed month.
The tasks that produce a determination stay with the person whose name goes on the work, and on tax files that boundary carries a criminal penalty under Internal Revenue Code section 7216.
Seven move well: transaction coding, accounts payable, accounts receivable follow-up, reconciliations, payroll preparation, tax return preparation and month-end close. Three never move: the signature, the diligence behind the review, and the client's consent.
Sort the Work by What It Produces
Hand off work that produces a record. Keep work that produces a determination. That test sorts almost every function in a small firm, and the tax rules happen to use the same one.
Under Treasury Regulation section 301.7216-2(d)(1), one tax return preparer may disclose a taxpayer's return information to another preparer located in the United States, including any territory or possession, without consent, for preparing or assisting in preparing the return or for auxiliary services connected to it, so long as the services provided are not substantive determinations or advice affecting the tax liability reported. The regulation then defines the term it just used. A substantive determination involves an analysis, interpretation, or application of the law.
That definition works as a staffing test well beyond tax. Ask what the task produces. If the output is a record someone can tie to a bank statement, an invoice or a signed document, the task travels. If the output is an interpretation, it stays with the person who will defend it.
Moving a task does not move the duty attached to it. That is the part firms discover late, usually in the middle of a season, and it is why the sort matters more than the rate.
Seven Accounting Tasks to Outsource First
These seven carry the most repetitions and the least interpretation. Take them in the order that matches where your firm is losing hours.
1. Transaction Coding and Monthly Bookkeeping
Transaction coding, ledger upkeep, chasing missing receipts and keeping the chart of accounts clean are high-volume, low-interpretation work, and the easiest to check. A reviewer can spot a miscoded transaction in seconds against a bank feed, which makes it the safest place to start and the fastest place to see whether a provider follows your process or its own.
There is a second reason to start here. Bookkeeping records do not automatically carry tax status. Treasury Regulation section 301.7216-1(b)(3) defines tax return information as information furnished for, or in connection with, the preparation of a return, and adds a carve-out that is easy to miss: the term does not include information identical to tax return information if the identical information was obtained otherwise than in connection with the preparation of a tax return. The test is how the information reached you rather than what it later gets used for, so a firm running both engagements for one client should settle which engagement each file belongs to before anything moves.
The decision it should drive: if seniors are coding transactions in March, that hour is the first one to buy back.
2. Accounts Payable and the Vendor Data It Feeds
Invoice capture, coding, matching against purchase orders, preparing payment runs and keeping vendor files current are all record work. Approval is not. Keep release authority with your client and give the provider a queue to prepare, never a button to press.
The vendor file is also where next January's information returns are won or lost, since a W-9 collected in June is a filing that does not blow up at the deadline. The IRS sets out when a payer must file a Form 1099 or other information return, and the data that feeds those forms is built in accounts payable all year. The threshold moved this year, and the same page puts the Form 1099-NEC reporting threshold at $600 for payments made before 2026 and $2,000 for payments made in 2026, with later years inflation-adjusted. Tell the provider which threshold it is coding to, because a vendor file still tuned to the $600 line will flag payments the current threshold no longer requires you to report.
So measure the provider on vendor file completeness before you measure it on invoices processed.
3. Accounts Receivable Follow-Up
Invoicing, cash application, aging reports and first-touch collection emails move cleanly. The awkward call to a client who has stopped paying does not, because that conversation is a relationship decision wearing an accounting costume.
Split the function on that line. The provider runs the cycle and flags the exceptions, and a named person inside the firm owns the accounts that have gone quiet.
The decision it should drive: if your aging report is stale because nobody has time to refresh it, you have a capacity problem, not a collections problem.
4. Bank, Credit Card and Balance Sheet Reconciliations
Reconciliations carry one of the highest ratios of time to judgment in a close. The output is binary. It either ties or it does not, which makes the work easy to hand over and easy to grade.
Grade it on exceptions rather than on hours. A provider that returns a clean reconciliation with three unexplained items is doing worse work than one that returns a messy month with every difference identified and documented.
Set the exception standard before the first month, not after the third.
5. Payroll Processing Support
Timesheet intake, payroll register preparation, variance checks against the prior run and the reporting pack afterwards are all delegable. The liability is not. The IRS is direct that the employer is ultimately responsible for the deposit and payment of federal tax liabilities even when a third party is engaged to handle them.
Ask to see the deposits themselves, not a report saying they were scheduled.
6. Tax Return Preparation and Workpapers
Preparation, workpaper build, tie outs, prior-year comparisons and e-file assembly are often the largest block of hours in a tax practice, and the reason firms look offshore at all. All of it can be prepared by someone else. What comes back is a draft, and it needs a reviewer who has the time and the standing to reject it.
Scoping this one starts earlier than the others, because a signed taxpayer consent has to exist before any return information reaches a preparer outside the United States.
The decision it should drive: count the review hours a batch of prepared returns will create before you agree to the batch size. Preparation capacity without review capacity moves the bottleneck rather than removing it.
7. Month-End Close and Draft Financial Statements
Close checklists, accrual and prepaid schedules, intercompany tie outs, supporting schedules and a first draft of the statements are all record work. The accounting positions inside them are not, and neither is the report your firm issues.
If your firm also performs an audit, review or compilation for the same client, run the independence analysis before any of this moves. Hiring someone else to do the work does not remove the question, because the work is still your firm's service, performed by people your firm engaged.
The decision it should drive: hand over the schedules, keep the judgments, and write down which is which before onboarding starts.
Three Duties You Cannot Hand Off
All seven of those tasks can leave the building. These three cannot, whoever you hire and wherever they sit.
The Signature, and the Responsibility Behind It
The signature follows responsibility rather than workload. Treasury Regulation section 301.7701-15(b)(1) defines the signing tax return preparer as the individual tax return preparer who has the primary responsibility for the overall substantive accuracy of the preparation of the return or claim for refund. The same section treats a preparer who is not that individual, but who prepares all or a substantial portion of the return, as a nonsigning tax return preparer.
An offshore or outsourced preparer can do the preparation and still be the nonsigning one. Primary responsibility for overall substantive accuracy has to sit with someone in your firm who has read the file.
The Diligence Behind the Review
Relying on someone else's work is allowed. What the rules give you is a presumption, and the presumption has a price. Section 10.22(b) of Treasury Circular 230 provides that, except as modified by sections 10.34 and 10.37, a practitioner will be presumed to have exercised due diligence for purposes of that section if the practitioner relies on the work product of another person and the practitioner used reasonable care in engaging, supervising, training, and evaluating the person, taking proper account of the nature of the relationship between them.
Read the conditions on that presumption as a to-do list, because that is what they are. Engagement, supervision, training and evaluation are four things your firm has to be able to show it did. Section 10.36 of the same rules puts a further obligation on whoever holds principal authority over the firm's tax practice, to take reasonable steps to ensure the firm has adequate procedures in effect for complying with them.
The Client's Consent, and the Notice Before It
Confidential client information moves under a contract or a consent, never under an assumption. The Journal of Accountancy sets out the professional requirement plainly: the Use of a Third-Party Service Provider interpretation, ET section 1.150.040, requires a CPA firm to inform the client, preferably in writing, that a third party may be used on the engagement, before confidential information is provided to that third party. The related interpretation at ET section 1.300.040 requires the firm to plan and supervise the third party's work and to make sure it has the required professional qualifications, technical skills and other resources.
Put the disclosure in the engagement letter and it stops being a conversation you dread each spring.
What Changes When the Work Crosses a Border
Only one of the seven tasks changes legal character at the border on its own, and that is tax return preparation. The reason is narrow. Treasury Regulation section 301.7216-1(b)(1) defines a tax return, for these rules, as any return or amended return of income tax imposed by chapter 1 of the Internal Revenue Code, which is why payroll filings and information returns do not pull the border rule in by themselves. Bookkeeping and close work join it the moment their output is furnished for a return.
Consent comes first. Treasury Regulation section 301.7216-3 requires a written, signed and dated taxpayer consent, with prescribed contents, before a preparer discloses return information to a preparer located outside the United States, and it cannot be given after the fact.
One piece of relief matters for business clients. Under section 301.7216-3(a)(3)(iii), a consent for a taxpayer who does not file in the Form 1040 series may be in any format, including an engagement letter, and in place of naming each specific recipient it may allow disclosure to a descriptive class of entities engaged by the taxpayer or the taxpayer's affiliate for services in connection with the preparation of tax returns. The regulation illustrates the paragraph with an engagement letter in which a corporate client consents to disclosure to its preparer's affiliated firms located outside the United States. None of that relief reaches Form 1040 clients, whose consents follow the format prescribed in Revenue Procedure 2013-14.
For individual clients there is a second gate. The same section bars a preparer inside the United States from obtaining consent to disclose the taxpayer's Social Security number to a preparer outside the United States on a return in the Form 1040 series, and requires the number to be redacted or masked before the information goes abroad.
The one way out is narrow. The disclosure has to run through an adequate data protection safeguard as defined in published guidance, and the consent request itself has to verify that the safeguard is maintained. The IRS guidance that defines that safeguard and prescribes the mandatory consent wording for Form 1040 filers is Revenue Procedure 2013-14.
The exposure for getting it wrong is both criminal and civil. Under section 7216 a knowing or reckless unauthorized disclosure is a misdemeanor, punishable by a fine of not more than $1,000, or imprisonment of not more than 1 year, or both, together with the costs of prosecution. That fine rises to $100,000 where the disclosure or use is one to which section 6713(b) applies. Section 6713 also carries a civil penalty of $250 for each disclosure or use, capped at $10,000 in a calendar year, and those civil figures rise to $1,000 and $50,000 when the disclosure is connected to a crime relating to the misappropriation of another person's taxpayer identity.
Security oversight travels with the file too. The FTC Safeguards Rule at section 314.4(f) requires you 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 each provider based on the risk it presents and the continued adequacy of its safeguards. The rule reaches accounting practices directly, because the example at section 314.2(h)(2)(viii) states that an accountant or other tax preparation service in the business of completing income tax returns is a financial institution for these purposes.
How to Sequence the First Handoff
Start with the process you repeat most and interpret least. That is usually reconciliations or transaction coding, and it gives you the fastest read on whether a provider follows instructions.
Write the process down before you hand it over. The quickest version is to record yourself doing the task once, then have someone else turn the recording into a checklist and run it while you watch. Firms without documented processes tend to blame the provider for gaps the firm never closed.
Test on work you have already completed. Give the provider a block of files your team finished last season, then compare what comes back against what your reviewer produced. Completed returns are still tax return information, so anything going offshore needs the signed consent in hand first, and on Form 1040 series files the Social Security number has to be masked unless the safeguard exception is met. You get a difference you can measure instead of a reference you have to trust.
Keep an exception log from day one. Every rejected item, every rework, every question that should not have been asked. Expand scope when the log stops surprising you, and not before.
When to Keep the Task In-House
Some work should not move yet, and a provider worth hiring will say so.
Keep it in-house when the process changes every time it runs, because there is nothing to hand over except your judgment. Keep it when one client makes up most of the work and losing continuity would be worse than the hours you save. Keep it when the client has refused consent, since no commercial argument survives that. Keep it when the engagement is attest work and the independence analysis has not been done.
The honest one that firms miss: if your bottleneck is review rather than preparation, adding preparation capacity makes the queue longer, not shorter. Buy review time back first by moving the record work off your reviewers, then add preparation volume.
Write the Split Down Before You Hire
The sort is the whole decision. Record work leaves, determinations stay, and the duties that attach to the file follow your firm rather than the provider you hired. Firms that write that split down before onboarding spend the first season checking output. Firms that skip it spend the first season discovering which duty they assumed somebody else had.
Pick one process this week, document it, and give it away as a test rather than a purchase.
If your firm is carrying that volume, don't trust us, test us. Accountably places trained offshore accountants and tax preparers inside US CPA and EA firms, and the low-risk way to start is a Free 40-Hour Proof Pilot, a fixed block of your own representative work put through multi-layer review so your reviewer grades real output before a client file depends on it. The consent and masking rules apply to a pilot exactly as they apply to a live engagement, so the pilot is scoped to files your firm can release under them.