Last reviewed October 7, 2026 · By the NYBACS advisory team
Short answer
Audit coordination helps a foreign-owned US subsidiary deliver what the parent's group auditor needs, on the parent's timetable and in the parent's reporting format. It means interpreting the group audit instructions, closing the US books to the parent's year-end, reconciling intercompany balances, bridging US GAAP figures to IFRS, Ind AS or another parent framework, and managing communication between the US company, the parent's finance team, the group auditor and any US component auditor.
Key takeaways
- US law does not require a standalone audit of most private subsidiaries, but the parent's auditor usually needs evidence over the subsidiary's numbers for consolidated accounts.
- The group auditor decides the scope for the US entity, which can range from analytical review of a reporting package to a full audit by a US component auditor.
- A parent with a March 31 year-end (common in India and Japan) and a US subsidiary on a calendar tax year needs a separate, audit-quality close at the parent's year-end.
- Intercompany balances must agree on both sides, in the same currency at the agreed rate, or consolidation cannot eliminate them.
- Transfer-pricing and intercompany agreements are frequently requested, because they support the charges that move between the parent and the US entity.
Where the audit requirement comes from
A foreign parent preparing consolidated financial statements must include its subsidiaries, and its statutory auditor must have sufficient evidence over the whole group. For a US subsidiary, the requirement therefore comes from the parent's home-country law and auditing standards, not from US law.
The group auditor plans the work around which subsidiaries are significant to the group. A small US sales office might only need to provide a reporting package that the group auditor reviews analytically. A larger or riskier subsidiary may need specific procedures on revenue or receivables, or a full audit performed by a US firm acting as component auditor. For US-based groups, the AICPA's revised group audit standard, SAS 149, applies to audits of group statements for periods ending on or after December 15, 2026, reflecting a similar risk-based approach.
What the group auditor's instructions usually ask for
Group audit instructions typically arrive a few months before the parent's year-end and may include:
- A reporting package in the parent's template: trial balance mapped to the group chart of accounts, balance sheet, income statement and supporting notes.
- Component materiality and the specific accounts or risks to be tested.
- Intercompany confirmation of balances and transactions with each group company.
- Subsequent events reporting up to the date the group signs its accounts.
- Deliverable deadlines, often much earlier than the group's own sign-off date.
- Component auditor reporting, if a US firm is engaged, including memos and confirmations of independence.
US finance teams that have never seen these instructions often underestimate how early the deadlines fall.
Bridging framework, currency and year-end differences
| Difference | Practical issue | Coordination step |
|---|---|---|
| Reporting framework | US books under US GAAP, group reports under IFRS, Ind AS or UK FRS | Maintain a documented GAAP-to-group-framework adjustment schedule |
| Functional currency | US entity reports in USD, parent consolidates in INR, GBP, EUR or JPY | Agree translation rates and who performs translation |
| Year-end | Parent closes March 31, US entity closes December 31 | Perform a full close at the parent's year-end as well as the US tax year-end |
| Chart of accounts | US ledger accounts differ from group mapping | Maintain a stable mapping table approved by the parent |
Differences in areas such as leases, revenue, share-based payments and financial instruments can produce adjustments between US GAAP and the group framework, so each needs to be identified rather than discovered at consolidation.
Intercompany balances are where group audits stall
Typical intercompany flows for a US subsidiary include capital injections, loans, service fees, cost recharges, royalties and goods purchased from the parent. Problems arise when the parent records an invoice in March that the US entity books in April, or when one side records a loan and the other records equity.
Good coordination means monthly intercompany reconciliations, a shared cutoff calendar, written intercompany agreements, and documentation supporting how fees and recharges are priced. Transfer-pricing support is also relevant to US tax: a US corporation that is at least 25% foreign-owned reports related-party transactions on Form 5472, and the same figures should agree to the audited numbers.
Who talks to whom
A group audit involves several parties with different deadlines: the parent's finance team, the parent's auditor, the US subsidiary's management, the US component auditor where one is used, and the US tax preparer. Coordination means a single tracker of requests and owners, one person on the US side who can answer for the books, and agreement on which version of the trial balance everyone is working from.
The independent auditors remain responsible for their own procedures and conclusions. The coordinating role is to make sure the evidence they need arrives in the right format at the right time. Agreeing at the outset who signs off the reporting package on the US side, and who on the parent side accepts it, prevents last-minute disputes over which figures were final.
Common mistakes to avoid
- Waiting for group audit instructions instead of asking the parent's finance team for last year's instructions and timetable.
- Closing the US books only at the US tax year-end when the parent's year-end falls on a different date.
- Booking parent funding as equity on one side and as a loan on the other.
- Submitting a reporting package mapped differently from the prior year without explaining the change.
- Leaving intercompany service or royalty charges without a written agreement or pricing support.
- Assuming the US tax return figures can be reused for group reporting without GAAP or framework adjustments.
NYBACS 360° support
How NYBACS helps
- Reviews the group auditor's instructions and converts them into a US-side checklist with owners and dates.
- Performs an audit-quality close at the parent's year-end, alongside the US calendar-year close where needed.
- Prepares monthly intercompany reconciliations and agrees balances with the parent's finance team.
- Builds the reporting package and a documented US GAAP to group-framework adjustment schedule for management and the parent to approve.
- Acts as the US contact for the group auditor and any US component auditor, keeping the Form 5472 related-party figures consistent with the audited numbers.
Frequently Asked Questions
Does the US subsidiary need its own US audit firm?
Only if the group auditor decides it needs a component auditor for the US entity, or another stakeholder requires a standalone audit. Some group auditors perform the work themselves remotely or through their US network firm.
Can the US entity change its year-end to match the parent?
It may be possible for financial reporting, but a change of tax year for a US corporation has its own IRS rules and may need approval. Many groups keep different year-ends and perform an extra close instead; get tax advice before changing.
Who decides the US subsidiary's materiality?
The group auditor sets component materiality as part of planning the group audit. The US team should ask for it early because it determines which balances will be tested in detail.
What if the parent and US entity disagree on an intercompany balance?
Trace both ledgers transaction by transaction to find timing, currency or classification differences, then agree a correcting entry with documentation. Unresolved differences are usually reported to the group auditor and can delay consolidation.
