What is a bonded warehouse?
A bonded warehouse (ZFL) is a special warehouse approved and supervised by the Swiss customs administration. It is physically separated from the rest of the Swiss customs territory and is treated for tax purposes as not in free circulation, comparable to a perpetual transit status. Goods stored within it are deemed not yet imported into Switzerland. Import duties and value-added tax fall due only when the goods are physically removed and brought into free Swiss commerce.
Switzerland operates several such bonded warehouses; the largest and best-known is located at Genève Ports Francs, with further sites in Zurich, Basel and Chiasso. For diamonds as a mobile, value-dense asset class, certified high-security facilities with a four-eyes principle, biometric access control and continuous surveillance set the relevant standard.
Important distinction
Switzerland has two similar constructs: the bonded warehouse (ZFL) and the open customs warehouse (OZL). Both grant a tax suspension until withdrawal and are suitable for diamonds. The main difference lies in the legal basis and the flexibility for ownership transfer inside the warehouse; for the private investor in practice, the differences are usually secondary.
Tax advantages: save 7.7% and more
The most significant financial incentive of the bonded warehouse is the full suspension of value-added tax. In Switzerland the standard VAT rate is 7.7%. Anyone purchasing diamonds worth CHF 300,000 and storing them directly in a bonded warehouse saves more than CHF 23,000 immediately, compared with a normal domestic delivery address. Import duties are also avoided.
Particularly attractive: diamonds can be resold within the warehouse without tax exposure. If ownership of a natural diamond changes while it remains in the bonded warehouse, no VAT arises. The same applies to direct sales from the warehouse to buyers abroad: the transaction stays completely tax-free. Only when the diamond is physically imported into Germany (19%), Austria (20%) or into Switzerland itself do the duties of the destination country arise.
For perspective: anyone who does not store in a bonded warehouse pays the VAT at the moment of purchase. This amount must first be earned back through value appreciation before any real gain emerges. With the bonded warehouse, that structural disadvantage is removed from the outset.
Swiss legal basis
The tax exemption is based on Art. 23 para. 2 of the Swiss Value-Added Tax Act (MWSTG): supplies of goods under customs supervision are exempt from domestic tax. This rule is long-established, politically stable and applies to diamonds without restriction.
Security: Swiss high-security standard
Swiss bonded warehouses for valuables meet the highest available level of security. Typical features:
- Biometric access control and multi-layered security airlocks
- 24/7 video surveillance and armed guard personnel on site
- Climate-controlled, shock- and fire-protected vault rooms
- Full insurance of all stored goods at current market value
- Direct supervision by the Federal Customs Administration
- Regular audits by independent auditors
Diamonds are light, discreet and extremely value-dense. This infrastructure offers ideal custody: markedly safer than a private home safe, bank-independent and therefore shielded from banking risk.
Legal separation: special assets with genuine protection
A decisive advantage over storage with a bank is the full legal separation of the stored diamonds. The natural diamonds are not entered on the balance sheet of the warehouse operator but held as special assets in your name. This means:
- In the event of the warehouse operator’s insolvency, your ownership remains untouched
- No counterparty risk towards banks or financial intermediaries
- Clear ownership through named warehouse documentation
- Storage segregated from other client assets
This principle of segregated assets is firmly anchored in Swiss law and sets physical bonded-warehouse storage fundamentally apart from deposits or securitised products.
Global flexibility and discreet execution
Diamonds in a Swiss bonded warehouse are not geographically locked in. At any time they can:
- Be transferred to another bonded warehouse worldwide (e.g. Singapore, Luxembourg)
- Be transferred to a new buyer within the warehouse, without physical movement and without tax consequences
- Be sold directly out of the warehouse to buyers abroad
- Be temporarily withdrawn for personal viewing or recertification
- Be finally imported into Switzerland or a third country, if desired
This flexibility enables a fully private, internationally oriented investment strategy. Especially for investors with an international centre of life or estate planning across generations, the bonded warehouse is the most proven custody instrument for physical diamonds.
Step by step: how to store diamonds in a Swiss bonded warehouse
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Advisory conversation & portfolio analysis
In the first step, we clarify together your investment objectives, the planned investment horizon and a suitable strategy. We review which diamond qualities (GIA, IGI or HRD certified) make sense for your portfolio and define the optimal budget. From a six-figure investment volume, experience shows that bonded-warehouse storage becomes clearly worthwhile.
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Selection & certification of the diamonds
On the basis of your specifications, we select suitable natural diamonds from our curated network and procure the corresponding certificates from internationally recognised institutes (GIA, IGI, HRD). Every natural diamond is appraised and photographically documented prior to storage.
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Contractual documents & compliance
Welcome Future AG handles the entire administrative process: purchase contracts, customs declaration, AML review (anti-money-laundering) and client identification under Swiss law. You receive complete, legally robust documentation of your ownership.
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Secure storage in the high-security facility
The diamonds are transferred to the Swiss high-security facility by certified value transport and recorded in your name as special assets. The bonded-warehouse procedure is activated and supervised by the Federal Customs Administration.
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Ongoing reporting & inventory management
You receive regular reports with current valuations of your diamond portfolio. On request, we arrange personal viewing appointments at the warehouse during business hours. An audited annual statement confirms holdings and ownership.
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Sale, transfer or withdrawal
Should you decide at a later date to sell, we coordinate the transactions through our network, directly out of the bonded warehouse and tax-free for buyers abroad. If you wish to withdraw into Switzerland, we inform you of the applicable duties and plan the most efficient solution.
Economic orientation
From what volume is the bonded warehouse worthwhile?
The bonded-warehouse solution becomes attractive when the tax and security advantages clearly outweigh the ongoing costs. Investment volume, horizon, country of origin and the desired custody structure are decisive.
From a six-figure investment volume, a professional bonded-warehouse structure can become economically meaningful.
On an investment volume of CHF 200,000, the avoided Swiss VAT of 7.7% corresponds to about CHF 15,400.
Typical annual costs for storage and insurance can be offset by the tax advantage over many years.
For investors from Germany or Austria, the differential to national VAT can be considerably higher.
The actual benefit should always be reviewed individually. Welcome Future AG classifies volume, ownership structure, documentation and storage objective confidentially.
Welcome Future AG: your experienced partner since 1982
Welcome Future AG is a Swiss family office and diamantaire based in Lucerne. Since its founding in 1982 we have accompanied high-net-worth private clients, entrepreneurial families and institutional investors in investments in physical diamonds. Our services include:
- Selection and procurement of GIA, IGI and HRD certified diamonds
- Full execution of bonded-warehouse storage in certified Swiss high-security facilities
- Personal advisory by Patrick N. Leiser, Polished Diamond Grader (IGI diploma) and certified wealth manager (HSLU)
- Guidance for later sales through our international network
- Transparent fee structure without hidden costs
As an independent family office, we are committed solely to our clients and not to a bank, a fund or a producer. This independence is the basis for objective, sustainable investment advisory.
Personal advisory
Request your bonded-warehouse solution now
In an unhurried conversation, learn which diamonds suit your portfolio and how storage in a Swiss bonded warehouse would look for you specifically. We respond within one business day.
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