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Document retention periods in Switzerland require self-employed individuals, freelancers, and small businesses to keep business records, accounting vouchers, annual financial statements, and audit reports for 10 years. For documents related to real estate and property, the period is even 20 years. The retention period begins at the end of the fiscal year in which the document was created. Anyone who misses these deadlines risks back-tax assessments, fines from the ESTV (Federal Tax Administration), and — in the worst case — estimated tax assessments that end up far more expensive than any filing system.

If you are self-employed, there is no way around this topic. Whether you issue individual invoices as a sole proprietorship, send deposit invoices as a freelancer, or issue a final invoice as a small business — every document that is part of your business activity is subject to the retention requirement under Art. 958f OR. And unlike in Germany, where the retention period was shortened to 8 years in 2025, the Swiss retention obligation remains at 10 years.

The Key Points at a Glance

• Business records 10 years: Invoices, accounting vouchers, business reports, annual financial statements, and audit reports — to be retained from the end of the fiscal year (Art. 958f OR).
• Real estate and property documents 20 years: Records related to real estate must be retained for 20 years under Art. 70 para. 3 MWSTG.
• Electronic retention permitted: Scanning and digital archiving is allowed, provided the system complies with Art. 957b OR (complete, tamper-proof, available at any time).
• ESTV fines up to CHF 20,000.00: Anyone who cannot produce records on demand risks back-tax assessments and penalties — in extreme cases, a full revenue estimate without any deductions.
• Self-employed individuals are not exempt: The obligation applies to sole proprietorships, freelancers, SMEs, and anyone who issues invoices in a business context.

Which Documents Must You Retain — and for How Long?

The retention periods in Switzerland are governed by the Code of Obligations (OR) and the Value Added Tax Act (MWSTG). The central provision is Art. 958f OR, which applies to all companies required to maintain commercial accounting. It mandates the 10-year retention of business reports, accounting vouchers, annual financial statements, and audit reports.

But even those who are not required to maintain formal accounting — such as freelancers below the revenue threshold of CHF 100,000 — must retain all records relevant to the VAT for freelancers declaration. The ESTV wants to see every inbound and outbound invoice during an audit, and not just for the current year but for the entire retention period.

Overview: Retention Periods by Document Type

The period always begins at the end of the fiscal year, not on the date of the invoice. If you issue an invoice on March 15, 2025, and your fiscal year matches the calendar year, the 10-year retention period begins on December 31, 2025, and ends on December 31, 2035. The invoice can therefore be destroyed in early 2036.

What Counts as a "Business Record"?

Business records are all documents relevant to accounting and tax returns. These include:

• Outbound invoices (invoices you send to customers)
• Inbound invoices (invoices you receive from suppliers)
• Receipts for cash purchases and expenses
• Bank statements and account statements
• Payroll records and social insurance documents
• Contracts with customers, suppliers, and service providers
• Correspondence with tax relevance

If you are wondering whether a record needs to be retained, the simple rule of thumb is: if the document is part of your business activity or could be relevant for taxation — keep it.

Electronic Retention: Scanning Instead of Paper Piles

The good news for anyone who does not have space for filing cabinets: Art. 957b OR explicitly permits the electronic retention of business records. The paper original does not necessarily have to be kept, provided the electronic copy meets certain requirements.

For a scanned record to meet the requirements, the system must satisfy three criteria:

1. Completeness: Every record must be captured completely and without alteration. The scan must contain all information from the original, including stamps, signatures, and handwritten notes.
2. Tamper protection: The system must document in a verifiable manner when and by whom a record was captured. Subsequent changes must be either impossible or at least traceably documented.
3. Availability: Records must be readable within a reasonable time at any point during the entire retention period. This means you must store the data in a format that will still be openable 10 years from now.

In practice, this means: a smartphone photo is sufficient if the software provides a tamper-proof archive with timestamps and access logs. If you do it right, you do not need to store any paper records at all — which is especially practical if you are already moving toward paperless accounting.

Mini-Story: How Stefan from Bern Lost CHF 3,500

Stefan from Bern runs a small web agency as a sole proprietorship. He always billed cleanly, but he was careless with receipts. Receipts ended up in a drawer, sometimes in his jacket pocket. When the ESTV audited him in 2024 for the year 2021, about 40 receipts for business expenses were missing — software subscriptions, office supplies, a new laptop. Stefan could not substantiate the expenses. The ESTV disallowed the corresponding deductions and instead applied an estimated profit. The back-tax assessment including interest came to CHF 3,500.00. Stefan had actually incurred the expenses, but without a receipt there is no deduction. Since then, he scans every receipt immediately with his phone and files it digitally.

QR-Bills and Electronic Records

If you create QR-bills, you must retain them as well — both the issued invoice and the payment confirmation. A QR-bill is an accounting voucher like any other. If you send invoices electronically and your customers pay by QR-bill, each transaction creates a record subject to the 10-year retention period. With Magic Heidi you can easily create invoices and have records automatically archived — without having to worry about retention periods.

Self-Employed Individuals and the Retention Obligation: Does It Apply to Me?

A common question from freelancers and solo self-employed individuals: Does the retention obligation apply to me even if I am not VAT-registered? The answer is a clear yes.

The retention obligation under the OR applies regardless of VAT liability. Even if you are below the revenue threshold of CHF 100,000 and do not charge VAT, you must retain your records for income tax purposes. The tax office wants to be able to verify during an audit what income and expenses you had. Without records, an assessment may be imposed, which typically works against the taxpayer.

For AHV (the Swiss old-age and survivors' insurance), there is an additional particularity. The compensation fund requires self-employed individuals to retain their records for at least 10 years in order to substantiate business expenses during contribution audits. Anyone who lacks records here risks an estimate of the AHV-subject income — which can trigger substantial contribution back-assessments.

What Happens During an AHV Contribution Audit

During an AHV audit, it is not enough to simply present invoices. The compensation fund reviews the entire business expense trail. This means: bank statements, receipts, contracts, payroll records — everything must be documented. If you maintain clean bookkeeping for the self-employed in Switzerland from the start, such an audit is no drama. If not, a routine audit can quickly turn into a back-assessment.

Mini-Story: The AHV Audit of Claudia from Zurich

Claudia from Zurich works as a freelance graphic designer. Her revenue in 2023 was around CHF 85,000, below the VAT threshold. She thought she could handle records casually and sorted them only once a year for the tax return. In 2025, the AHV contribution audit came. The compensation fund asked for records covering CHF 12,000 in business expenses — software, training, travel, office supplies. Claudia found about half. For the missing half, the AHV did not recognize the expenses and instead set a higher AHV-subject income. The back-assessment for three years came to CHF 2,800.00 in contributions. Since then, Claudia has a clear record process and uses a digital archive where every receipt lands immediately after purchase.

The 20-Year Period: Real Estate and Property

A particularity that many self-employed individuals are not aware of concerns real estate and property. Under Art. 70 para. 3 MWSTG, records relating to real estate must be retained for 20 years.

This applies in particular to:

• Purchase agreements for real estate and property
• Invoices for construction services, renovations, and conversions
• Land register extracts and mortgage documents
• Records for investments in real estate

Anyone active as a property manager, real estate agent, or property developer must take this period especially seriously. But even a self-employed individual who uses a property for business purposes — for example, a home office in their own house or a commercial property — must retain the relevant records for 20 years.

The reason for the longer period lies in the particular nature of real estate investments. Value appreciation can span decades, and the VAT treatment of real estate transactions is complex. The ESTV wants to ensure that in the event of a sale, all records are still available even after many years.

Industry-Specific Particularities

In addition to the general retention periods, there are industry-specific regulations you must observe:

Medicine and healthcare: Therapists, doctors, and nursing staff must retain patient data for 15 years under the Health Act. Billing records are additionally subject to the 10-year OR period.

Legal and tax advisory: Lawyers and fiduciaries must retain files for 10 to 15 years depending on the canton. The exact period depends on professional regulations and cantonal provisions.

Trades with hazardous materials: Anyone working with hazardous substances may need to retain storage and disposal records for 15 to 20 years, depending on the requirements of the trade authority or environmental protection agency.

In these cases, it is advisable to check with the relevant professional association or authority for the exact requirements. The general 10-year retention period under the OR is the minimum — additional specific obligations may apply on top.

Practical Organization: How to Stay on Top of It

Retention periods in Switzerland are not complicated if you have a system from the start. Here are the practical steps that self-employed individuals and small businesses should follow.

Step 1: Scan Immediately, Don't Stack

Every receipt is captured digitally right away — ideally with your smartphone directly at the point of purchase. Apps like the one from Magic Heidi capture receipts by photo, automatically extract the relevant data, and file the record in a digital archive. This way, no paper pile builds up that first needs to be sorted months later.

Step 2: Consistent Filing Structure

Whether digital or paper-based: your filing should be structured by fiscal year and category. A simple structure might look like this:

• /2025/Income/ — Outbound invoices
• /2025/Expenses/ — Inbound invoices and receipts
• /2025/Bank/ — Account statements
• /2025/Payroll/ — Payroll records
• /2025/Contracts/ — Contracts
• /2025/RealEstate/ — Property-related records (20-year period)

This structure works for both local folders and cloud storage. The only thing that matters is that you apply it consistently.

Step 3: Document VAT Reporting Cleanly

If you are VAT-registered, you must retain records for VAT reporting in addition to the OR retention obligation. Every inbound invoice showing VAT and every outbound invoice must be presentable to the ESTV during an audit.

Step 4: Record the Destruction Date

For each record, note the date from which it may be destroyed. In a digital archive, this can be a simple column in a table — or better, a software feature that notifies you automatically. This way, you avoid discarding records too early or storing them for longer than necessary.

Mini-Story: Andreas from Basel and the Wrong Filing Stack

Andreas from Basel runs a small IT services business. He had two filing stacks in his office: one for the current year and one for "older stuff." When he was asked in 2024 for records from 2019 — due to a follow-up VAT audit on a large customer invoice — he found the stack, but the receipts for CHF 6,200.00 in business purchases were missing. The ESTV disallowed the input tax deduction. Andreas paid CHF 502.20 in VAT that he could have deducted if the records had been available. Since then, he has a fixed process: every receipt is scanned the same day and filed in the digital archive, and the paper original goes into a folder per fiscal year.

When Are You Allowed to Destroy Old Records?

After the respective period expires, you may destroy the records. This applies to all records, books, and documentation that were subject to the retention obligation. There are a few points to keep in mind:

• Calculate the period correctly: The period ends on the last day of the fiscal year that is 10 or 20 years after the year of creation. If the record was created in fiscal year 2024, the 10-year period ends on December 31, 2034. Destruction is permitted from January 1, 2035.
• Observe data protection: Records may contain personal data. When destroying them, it must be ensured that the data cannot be reconstructed. Paper records go in the shredder; digital data must be securely deleted.
• Backup copies: If you store digitally, make sure no additional copies exist on old hard drives or backup devices. A backup is sensible during the retention period; after that, it should also be deleted.

There is no formal act of destruction — you do not need to report to anyone that you have disposed of records. But in the event of a subsequent audit, you must be able to prove that the retention period had actually expired. It is therefore advisable to maintain a destruction log documenting which records were destroyed on what date.

What Happens If You Do Not Comply with the Retention Periods?

If you do not retain records, or retain them incompletely, this can have significant consequences. The ESTV can make estimates based on missing records, and these typically work against the business.

The possible consequences at a glance:

• VAT back-assessments: If inbound records are missing, the input tax deduction is denied. VAT (currently 8.1%) is charged on the estimated amount.
• Income tax estimates: The tax office estimates the profit, usually without the disputed deductions. This leads to a higher tax burden.
• Fines: In cases of intentional or grossly negligent failure to comply with the retention obligation, fines of up to CHF 20,000.00 under Art. 59 MWSTG may be imposed.
• AHV contribution back-assessments: The compensation fund can estimate the AHV-subject income, which can lead to contribution back-assessments.
• Burden of proof reversal: In disputes with customers or suppliers, you lose without records. The other party can claim whatever they want — you cannot disprove it.

In practice, the reality is usually less dramatic than the theoretical maximum sanction. Often it is about individual missing records rather than entire years. But even a missing record for CHF 500.00 can quickly trigger a CHF 100.00 VAT back-assessment — plus interest and administrative effort.

Germany in Comparison: 8 Years from 2025

For comparison: In Germany, the retention period for business records was shortened from 10 to 8 years as of January 1, 2025. In Switzerland, it remains 10 years. Anyone operating across borders must therefore be aware that the Swiss period is longer. For records that fall under both legal systems, the longer period applies.

Conclusion: Records as Part of Your Business Process

Retention periods in Switzerland are not a nuisance but a central part of business management. Anyone who has a system from the start — whether a digital archive, accounting software, or simply a fixed process — saves themselves stress later. And anyone who prepares their annual financial statement cleanly will not have to worry about missing records.

Magic Heidi pricing starts at a clear monthly amount that already includes digital record archiving, automatic VAT calculation, and QR-bills. Anyone looking for a cheaper bexio alternative will find a solution with Magic Heidi that comes without hidden costs and is tailored specifically to self-employed individuals and small businesses in Switzerland.

If you file your records digitally from the start, you will have the retention period sorted in 10 minutes — not in 10 years. And if the ESTV or the AHV ever comes knocking, you have everything at your fingertips in three clicks. That is the difference between a record obligation that accompanies you and one that burdens you.