Financial Due Diligence in Sweden: What Foreign Buyers Get Wrong
A foreign PE fund or strategic buyer commissions due diligence on a Swedish target. The data room arrives. The local advisor builds a trial balance from whatever Excel export the seller provided. Two weeks in, nobody has opened the SIE file sitting in the accounting system. This is the most common starting mistake on Swedish deals — and it costs time, budget, and sometimes the deal.
Sweden is not the UK. It is not the US. The accounting data arrives in a different format, the reporting regimes diverge in ways that move EBITDA, and the deal structures carry tax consequences that most international buyers do not model before signing. Getting FDD right in Sweden is not about working harder. It is about knowing what to ask for and what to check first.
Why Sweden is different from UK/US diligence
Three things make Swedish FDD different from what most international buyers are used to:
The SIE file is the primary data source, not the management pack. In the UK, the seller produces a management pack — month-end P&L, balance sheet, cash flow, usually in Excel, sometimes in a data room platform. In Sweden, the most complete and structured data source is the SIE file the accounting system already produces. It carries full transactions and vouchers for the fiscal year in one compact, parseable format. If your diligence starts by asking for the Excel export, you are working from a degraded copy of data that already exists in full.
K2 vs K3 accounting regimes. Smaller Swedish companies report under K2, the simplified accounting regime. Larger ones report under K3, which is closer to full accounting standards. A buyer underwriting on an IFRS basis cannot read K2 numbers at face value. Capitalised development costs, goodwill treatment, operating lease accounting — each of these diverges between K2 and K3 in ways that move EBITDA. The bridging work has to happen in diligence, not after signing.
The statutory annual report (arsredovisning) is public, but the management accounts are not. Every Swedish limited company files an annual report with Bolagsverket. It is publicly available. But the annual report is historical and aggregated. It tells you what happened last year. It does not tell you what the seller believes about this year's run-rate, where the customer concentration sits, or what the working capital peg should be. Those questions need the management accounts — and the SIE file behind them.
For offshore diligence teams without Swedish accounting knowledge, these three differences compound. A generalist offshore team that treats a Swedish target like a UK target will miss the SIE file, misread K2 numbers, and build a databook from data that does not tie to the statutory accounts. The result is a deliverable that looks complete but contains adjustments the buyer only discovers at the negotiation table.
The SIE4 file: what it is and why you should ask for it first
SIE stands for Standard Import Export. It has been Sweden's de facto accounting data interchange standard since 1992, created by the SIE Group — a non-profit association of Swedish accounting software vendors and professional bodies. Because adoption across the Swedish software market is effectively universal, almost any target you look at can produce one.
SIE defines four file types:
- SIE1 — year-end balance. Opening and closing balances for all accounts. Useful for orientation, useless for answering diligence questions.
- SIE2 — period balance. Same as SIE1 plus monthly balance changes per account. Still a summary, not a transaction trail.
- SIE3 — profit centre balances. SIE2 plus object balances. Useful if the target runs profit centres, but still not transaction-level.
- SIE4 — full transactions and vouchers. A complete audit trail of every individual entry for the fiscal year. This is the file to ask for.
SIE5, the XML revision, arrived in 2018 to make the standard internationally readable. In practice, SIE4 remains what most Swedish accounting systems produce by default. Some newer systems emit SIE5. Either way, you want the file with the transactions in it — which means SIE4 or SIE5 with full voucher detail, not SIE1–SIE3.
The practical advantage is straightforward: from one SIE4 ingestion you can derive the monthly profit and loss at account level, the balance sheet, the account-level movement, and the voucher-level support for any figure. On a typical offshore diligence engagement, the first week disappears into reconstruction — re-keying or re-mapping whatever the seller managed to export, then reconciling it back to the reported numbers before any analysis begins. With an SIE4 file, that phase largely disappears. The seller's controller is not tied up producing custom extracts. More of the budget goes to analysis rather than data entry.
It also means our first-cut databook lands faster on a Swedish deal than on a comparable UK or US mandate. The file the ledger already produces carries more of what we need than whatever the seller can assemble in Excel.
K2 vs K3: where EBITDA diverges
A buyer underwriting on an IFRS or K3 basis cannot read K2 numbers at face value. These are the divergences that actually move EBITDA and net debt:
Capitalised development costs. Under K2, smaller companies can capitalise development costs that an IFRS-basis buyer would expect to see expensed through the P&L. The effect is straightforward: reported EBITDA is higher than the buyer's underwriting EBITDA, and the adjustment is material for software, engineering, and product companies. This is one of the most common re-trade items on Swedish SME deals.
Goodwill amortisation. IFRS does not amortise goodwill; it tests for impairment. K2 may permit amortisation of goodwill depending on the company's accounting policy and size. If the target has amortised goodwill through the P&L, the reported EBITDA is lower than it would be on an IFRS basis — the buyer adds back the amortisation, but only if the diligence team catches it.
Operating lease treatment. IFRS 16 moved operating leases onto the balance sheet for most companies. K2 and K3 treatment of leases can diverge from this, particularly for smaller companies that have not adopted IFRS 16-equivalent accounting. The effect runs through both EBITDA (rent versus depreciation) and net debt (lease liabilities).
P&L presentation format. K2 and K3 companies present their P&L in different formats. The line items are not always comparable. What looks like a cost of goods sold line under K2 may be a different classification under K3, and the buyer needs to reclassify before comparing to their own benchmarks.
The bridging work is not conceptually difficult. It is a mapping exercise: take the reported figures, identify each adjustment, apply it, and show the bridge from reported EBITDA to underwriting EBITDA. The difficulty is that most offshore teams without Swedish accounting knowledge do not know which adjustments to look for. They treat the reported numbers as the starting point and miss the re-trade items until the seller's advisor raises them.
Our approach is to bridge reported figures onto the basis the buyer is underwriting and show the bridge explicitly. The buyer sees exactly what moves from reported to underwriting, and why.
Working capital pegs in Swedish deals
Working capital pegs are one of the most common sources of post-completion dispute on Swedish deals, and one of the most common areas where foreign buyers apply the wrong methodology.
The mistake is using a twelve-month average and calling it a peg. A twelve-month average assumes the business is flat through the year. Swedish businesses are often not flat.
Construction businesses peak in the summer — revenue, receivables, and contractor payables all rise in Q2 and Q3. Retail businesses peak in Q4 — inventory builds through September and October, cash outflows spike, and the year-end balance sheet carries the seasonal peak. Tourism and hospitality businesses peak in Q2 and Q3. The peg has to reflect the point in the cycle at which completion will actually occur, not the average of the preceding twelve months.
A buyer who looks at the twelve-month average and calls it a peg has not done the work. The right approach is to identify the seasonal pattern from the monthly data, model where the working capital sits at completion, and set the peg at that point. If the deal completes in November, the peg should reflect a pre-peak position. If it completes in March, it should reflect a post-peak, post-cash-collection position. The difference between the two can be material for seasonal businesses.
Other working capital red flags that Swedish targets commonly carry:
- Customer concentration without the analysis. The top ten customers by revenue, with year-on-year movement per account, is a standard schedule. It is also the schedule most often left out of a seller's pack. A buyer needs to see churn and recovery, not just the headline number.
- Related-party transactions buried in the notes. Shareholder loans, cross-guarantees, shared services, and intra-group recharges are common in owner-led Swedish businesses. They are often disclosed in the notes to the statutory accounts rather than the management pack, and they are easy to miss if you are not looking for them.
- Deferred tax that has not been modelled. On a share deal, the buyer inherits the target's tax history. On an asset deal, the tax basis resets. The difference is material, and it is almost never modelled in the seller's pack.
Red flags foreign buyers miss in Swedish FDD
These are not subtle. They are just different from what a UK or US-trained diligence team expects to see:
The founder's premises. When the company occupies a building the founder owns through a separate entity, the rent is almost never at market. The adjustment is downward, it is material, and it is almost never volunteered by the seller. This is particularly common in Swedish founder-led businesses where the founder has owned the premises for decades and the company pays rent to a related entity.
Related-party transactions in the notes. Swedish statutory accounts disclose related-party transactions in the notes to the annual report. They are not always in the management pack. A diligence team that only reads the management pack misses them. A team that reads the annual report and the SIE file catches them.
The SIE file that does not reconcile to the statutory accounts. SIE4 is an advantage, but it is not a guarantee. If the target's bookkeeper has not reconciled the file to the statutory accounts, the diligence team is starting from a number that does not tie. This is the first thing to check, and the thing most teams check last. The reconciliation is simple: pull the SIE4 year-end balance, compare it to the balance sheet in the annual report, and investigate any line that does not match.
Deferred tax on share deals. On a share deal, the buyer inherits the target's tax basis. Unrecognized tax losses, deferred tax assets, and tax exposures carry through to the buyer. On an asset deal, the basis resets. Most seller packs do not model this, and most buyers do not ask for it.
How to commission FDD on a Swedish target
Getting FDD right on a Swedish target is mostly about asking for the right things at the right time. The data request should lead with what the accounting system already produces:
- SIE4 file from the accounting system — full transactions and vouchers for the fiscal year. This is the single most useful file on a Swedish target. Almost every ledger system can produce it.
- Statutory annual report (arsredovisning) — publicly available from Bolagsverket. Read it first for background, ownership structure, and any disclosed related-party transactions.
- Management accounts — month-end P&L, balance sheet, and cash flow for the current year to date, plus the prior two full years if available.
- Customer and supplier schedules — top ten customers and suppliers by value, with year-on-year movement where possible.
- Debt schedule — all debt facilities, terms, covenants, and maturity dates. Include shareholder loans and related-party debt.
When to bring in a specialist versus a generalist offshore team: if the target is a Swedish limited company with a Swedish accounting system, you want a team that understands SIE files and K2/K3 bridging. A generalist offshore team that treats the target like any other company will miss the things that matter on a Swedish deal. The specialist does not need to be in Stockholm. The work can be done offshore. What matters is that the team knows what to look for.
Fixed-project versus retainer: on a Swedish deal, a fixed-project engagement typically makes more sense. You need the databook and the diligence report for a specific transaction. You do not need an ongoing relationship. Our fixed-project model carries no minimum, no retainer, and no long-term tie-in. The starting point is one deliverable on one deal.
Timeline: on a fixed-project engagement with the data room index and the SIE file in hand, a first-cut databook lands inside 48 to 72 hours. The engagement models page explains how that works in practice.
Discuss a deal. If you are looking at a Swedish target and want to know what the databook would cover and what we would need from you, send the data room index. We will tell you what we can deliver in 72 hours.