Service 03 — Post-Acquisition Integration Accounting
The months after a deal closes are when accounting complexity peaks — two sets of books, two reporting structures, and a combined entity that needs a coherent financial foundation. We handle that transition systematically.
What this delivers
When the acquisition closes, the accounting work is just beginning. Two companies with different charts of accounts, different reporting periods, and different treatment of intercompany transactions need to become one coherent entity — and there's rarely a long runway to get there.
This engagement covers the accounting side of that transition — chart of accounts harmonization, opening balance sheet preparation for the combined entity, elimination of intercompany transactions, and alignment of reporting periods. The goal is a clean financial foundation for the combined business in the first three to six months after closing.
Harmonized accounts
Two charts of accounts reconciled into one coherent structure — so the combined entity's financials tell a single, readable story.
Clean opening position
Opening balance sheet for the combined entity prepared properly — with intercompany transactions eliminated and balances reconciled from day one.
Aligned reporting
Reporting periods aligned across the combined entity — so management, lenders, and advisors are all looking at the same financial picture.
The challenge
Most of the attention in an acquisition goes to the pre-close period — due diligence, negotiation, deal structure. The accounting complexity that follows the closing date is often underestimated until the team is already in the middle of it.
Two companies rarely have identical accounting structures. When they merge, the differences compound quickly — in how accounts are named, how periods align, how intercompany activity gets treated, and how the combined entity's opening position gets established. Left unaddressed, these create a financial picture that doesn't accurately reflect the business going forward.
Two companies with different account numbering, different cost center structures, and different categorization conventions produce combined reports that are difficult to read and act on.
Revenue and expenses between acquired and acquiring entities inflate the combined financials if not properly identified and eliminated before consolidation.
Without a properly prepared opening balance sheet, the financial starting point for the combined entity is unclear — and errors compound into every subsequent period.
Companies with different fiscal year-end dates require period adjustments before combined reporting reflects a consistent picture for management and lenders.
The approach
Our Post-Acquisition Integration Accounting engagement is structured around the specific accounting tasks that the first three to six months after close typically require. We work through these methodically — not as a general accounting retainer, but with a focused scope tied to what integration actually demands.
Each month of the engagement covers the active integration accounting work — moving from initial harmonization and opening balance preparation through to aligned combined reporting that your team, lenders, and advisors can rely on.
Chart of accounts harmonization — mapping and reconciling the two entities' account structures into a single, coherent chart for the combined business
Opening balance sheet preparation — establishing the combined entity's financial starting point with balances properly stated and reconciled from the closing date
Intercompany transaction elimination — identifying and eliminating transactions between the acquired and acquiring entities before consolidation
Reporting period alignment — adjusting for fiscal year-end differences so the combined entity's reporting reflects a consistent timeline across both businesses
Working together
Integration accounting is time-sensitive. The earlier we engage after close, the cleaner the foundation we can establish — and the fewer corrections that compound into subsequent periods.
Month 1
Account structure review, chart of accounts mapping, opening balance sheet preparation, and identification of intercompany transaction flows. This is the highest-intensity month of the engagement.
Month 2
Intercompany transaction elimination, reporting period alignment adjustments, and reconciliation of balances across the combined entity's first full reporting period.
Month 3
Review of the harmonized structure in operation, adjustment of any issues surfaced in the first two periods, and support for the combined entity's ongoing reporting rhythm.
Months 4–6
Continued support through the remainder of the integration period, addressing issues as they arise and ensuring the combined entity's financial picture remains coherent and accurate.
Investment
The engagement is priced on a monthly basis, reflecting the ongoing nature of integration accounting work. The scope is defined before each month's work begins — so you know what's covered and what to expect.
Post-Acquisition Integration Accounting
$2,200 USD/month
Monthly engagement — typically three to six months
Typical engagement length
3–6 months post-close
What's included each month
Chart of accounts harmonization
Opening balance sheet preparation
Intercompany transaction elimination
Reporting period alignment
Combined entity reconciliations
Monthly status review and updates
Documentation of adjustments made
Advisor-ready reporting support
The engagement begins ideally within the first few weeks after close. Earlier start dates allow for cleaner foundation work and fewer corrections in subsequent periods.
Methodology
Integration accounting is largely invisible when it's done well — the combined entity's financials look coherent from the outset, and reporting flows without the confusion that mismatched structures create. We track progress against the specific integration tasks, with monthly documentation of what's been addressed and what remains.
Defined scope each month
The accounting tasks for each month are defined and agreed before work begins — so the engagement stays focused and you have visibility into what's being addressed.
Documented adjustments
Every adjustment made to the combined entity's accounts is documented — so the rationale is available for review by your accountants, auditors, or lenders.
Clear timeline expectations
Most integrations require three to six months of active accounting support. The engagement scope reflects the genuine timeline rather than a compressed one that creates rework.
Handoff when complete
When the integration accounting is stable, the engagement concludes with documentation of the harmonized structure — giving your internal team or ongoing accountant a clear starting point.
Our commitment
Post-close is a period when accounting errors compound quickly. We approach integration accounting with the understanding that what we establish in the first months becomes the foundation the combined business works from — and that getting it right from the start is meaningfully less costly than correcting it later.
If the situation is more complex than what a standard integration accounting engagement covers — for instance, a multi-entity acquisition or an international structure — we'll say so clearly in the first conversation, before anything is committed.
Each month's work is scoped and agreed before it begins — so you know what's being addressed and can track what's complete.
Every change to the combined entity's accounts is documented with rationale — available for review by auditors, lenders, or internal teams.
Complex international or multi-entity situations may fall outside this engagement's scope. We'll tell you that clearly before work starts.
Getting started
Integration accounting support works best when it begins early. Reaching out before close — or within the first few weeks after — gives us the best chance to establish a clean foundation from the start.
Describe your situation
Let us know where you are in the transaction — close date, the two entities involved, and any complexity you're aware of. That's enough to start.
Initial conversation
We discuss the structure of the acquisition, what accounting systems the two entities use, and what the integration accounting will require — then confirm whether the engagement is the right fit.
Engagement scope agreed
The monthly scope, timeline, and fee are confirmed in writing. Access to the relevant financial systems and materials is arranged.
Work begins
Integration accounting begins in month one — foundation work first, then elimination, alignment, and stabilization through the subsequent months.
Post-Acquisition Integration Accounting
The accounting work that follows a closing date shapes how the combined business's financials look — and how much rework accumulates if the foundation isn't set properly. Reach out and we'll discuss what your transition requires.
Get in touchOther services
Integration accounting often follows from earlier work in due diligence or valuation. Some clients engage us across multiple phases of a transaction.
Service 01
Financial due diligence covering target company review, quality of earnings, working capital normalization, and identification of financial anomalies. For businesses on either side of a transaction.
$5,500 USD
Learn more →Service 02
Estimated valuations using DCF, comparable company analysis, and asset-based approaches. Written report includes valuation range, methodology, and key assumptions. For sale, buy-in, or estate planning purposes.
$3,000 USD
Learn more →