Identify the legal question before doing arithmetic
The Swiss Federal Social Insurance Office distinguishes the treatment of pillar 3a at divorce from the occupational-pension split. The 3a outcome depends on the matrimonial property regime. Under the usual participation in acquisitions regime, the FSIO describes sharing tied 3a funds built up during marriage. Do not apply that simplified description to every balance: a marriage contract, pre-marriage assets, the origin of contributions and the wider settlement can change the analysis. A separation and a final divorce are also different steps. For foreign assets or a cross-border marriage, have the applicable law checked before using Swiss assumptions.
Request a timeline, not a screenshot
Start with an inventory of bank foundations and insurers, including any old account whose assets were transferred. Ask for statements around the marriage and the valuation date your legal adviser identifies. Keep annual contribution certificates, records of transfers and early withdrawals, and evidence of the source of unusual payments. For an insurance policy, request a dated valuation and ask how it relates to surrender value, insured benefits and premiums. A projected maturity amount can be useful for planning but does not establish what can be allocated in a settlement today.
A simple example of a misleading balance
Imagine a 3a account with CHF 14,000 on the marriage date and CHF 42,000 on a later statement. Dividing the later balance in two gives CHF 21,000, but that is only arithmetic. Even the CHF 28,000 difference cannot automatically be treated as contributions made during marriage: it may include investment changes or transfers. Assume one CHF 9,000 entry came from closing another 3a account. Trace that source rather than counting the same assets twice. A useful file separates payments, transfers, returns and withdrawals, leaving their legal classification to the settlement process.
Make old transfers traceable
When one provider statement starts with a large opening credit, find the closing statement from the previous institution and match amount and date. If there is a gap, ask whether it reflects an investment sale, costs or a payment unrelated to the transfer. Mark anything unresolved as such. This makes the inventory useful to both advisers without representing it as a legal valuation.
Do not make a private payout to settle the issue
Ask the institutions and your legal adviser how any allocation should be implemented and what documents they require. The tied nature of 3a remains relevant; the proposed division is not itself instructions to pay cash into a private account. Check whether a policy’s risk cover would be affected and which confirmations you should retain. Once the divorce is effective, review your beneficiaries and future contributions separately from the asset division. Bring a one-page inventory and the underlying statements to the first review; it will surface missing evidence before anyone negotiates around an unreliable total.