Most first-year founders don't lose money on big decisions.
They lose it on small habits nobody warned them about.
Each mistake below looks harmless in month two. By month eleven it's an expensive afternoon with your Treuhänder, or worse.
Here are seven we see over and over, why each one hurts, and the fix.
Mistake 1: Mixing personal and company money
What it looks like: the company's software on your private card. A private dinner on the company card. "I'll sort it out at year-end."
Why it hurts: your company is a separate legal person. Every mixed transaction has to be untangled, documented and booked correctly. Private costs paid by the company can also be treated as a hidden profit distribution (verdeckte Gewinnausschüttung). That can trigger 35% withholding tax (VStG Art. 4). If the company doesn't recover the tax from the shareholder, it's grossed up, to about 53.85% of the amount.
The fix:
- A company account and company card from day one.
- If you pay a company cost privately, file an expense claim with the receipt and get reimbursed.
- If you lend the company money, document it as a shareholder loan.
Mistake 2: One account for everything
What it looks like: all revenue, all currencies and all costs flow through a single CHF account.
Why it hurts: every euro or dollar that touches the account gets converted, and you lose visibility of what you earn and spend in each currency.
The fix: open an account for every currency you regularly earn and spend. Keep them in one place so you still see the full picture.
Mistake 3: Converting on every invoice
What it looks like: EU clients pay euros, which get converted to CHF. Then you pay an EU supplier, which converts CHF back to euros.
Why it hurts: you pay a fee and a spread twice on money that started and ended in euros. (Hypothetical: at 1% per conversion, that round trip costs about 2%.)
The fix: hold EUR, receive EUR, pay EUR, and convert only the surplus. The full method for measuring the cost is in The FX Fee Your Bank Never Shows You.
Mistake 4: Hiring without a payroll plan
This is the expensive one.
What it looks like: you agree a salary with your first employee and pay them, without having registered for social insurance or arranged the required cover.
Why it hurts: as an employer in Switzerland you take on real obligations from the first salary:
- First pillar (AHV/IV/EO): you register with a compensation office (Ausgleichskasse), deduct the employee's share from salary and pay both shares. In 2026 that's 10.6% of salary, split 5.3% employer and 5.3% employee.
- Unemployment insurance (ALV): 2.2% (1.1% each) on salary up to CHF 148,200 a year. Since 2023 there's no solidarity contribution on salary above that.
- Family allowances (FAK): also handled through the compensation office. Contributions and allowances vary by canton.
- Accident insurance (UVG): compulsory for employees.
- Second pillar (BVG): employees earning at least CHF 22,680 a year (2026 entry threshold) must be insured with a pension fund. The coordination deduction is CHF 26,460, and the upper limit of salary covered by mandatory BVG is CHF 90,720.
Paying salaries without this in place means back-payments and admin catch-up later, and an awkward conversation with your employee.
The fix: before the first payslip, register with a compensation office, take out accident insurance, choose a pension solution if it's needed, and set up payroll that handles the deductions every month.
If you're a founder-director paying yourself a salary from your own GmbH or AG, the same rules apply to you, even if you're the sole owner. One more trap: if you pay yourself a very low salary and high dividends, the AHV office may requalify part of the dividends as salary.
Mistake 5: The year-end shoebox
What it looks like: twelve months of receipts in a bag, a drawer and three email inboxes. In February your Treuhänder asks for "everything".
Why it hurts: reconstructing a year takes far longer than recording it as you go, and lost receipts mean expenses you can't properly book. Swiss companies also have legal record-keeping duties: business records have to be kept for ten years from the end of the financial year (OR Art. 958f). For VAT, records relating to real estate can need keeping for up to 26 years (MWSTG Art. 70).
The fix:
- Photograph each receipt the moment you pay.
- Categorize it when it happens, not in February.
- Use accounting software that matches transactions to receipts, so nothing has to be reconstructed later.
- Do a 10-minute review every Friday.
For bills you pay rather than card receipts, see Forward a Bill, Click Approve: Accounts Payable on Autopilot.
Mistake 6: Never checking what your account really costs
What it looks like: you know the monthly fee. You've never added up payment fees, FX spreads, card fees and add-ons.
Why it hurts: a provider that looks cheap on the monthly fee can be expensive once you add up everything else, and the reverse can be true too.
The fix: once a quarter, take your statement and add up every cost line, plus the spread on your conversions. Divide by your total volume. Now you can compare providers on what actually matters.
Mistake 7: Waiting weeks to get banked
What it looks like: the company is registered, but the operating account is "still in onboarding" for weeks. Invoices go out late or with temporary payment details.
Why it hurts: you can't invoice cleanly, can't pay suppliers or salaries on time, and lose momentum right when you need it.
The fix: prepare all the documents at once (company, people, business, money) and answer follow-up questions the same day. The full checklist is in How to Open a Swiss Business Account in Days, Not Weeks.
Bonus: VAT can sneak up on you
Not a habit, but worth knowing: businesses are liable to Swiss VAT unless their worldwide turnover from taxable supplies is below CHF 100,000 a year (MWSTG Art. 10). VAT-exempt turnover doesn't count towards that threshold, and you can register voluntarily below it. Track your revenue from month one so registration isn't a surprise.
The 7 fixes on one page
- Mixing money — Fix: Company account + card, expense claims, documented loans
- One account for everything — Fix: One account per currency you earn and spend
- Converting every invoice — Fix: Hold, receive and pay in the same currency
- Hiring without a payroll plan — Fix: Register AHV/FAK, UVG and BVG before the first payslip
- Year-end shoebox — Fix: Capture and categorize receipts as you go, weekly review
- Unknown account costs — Fix: Quarterly all-in cost check
- Waiting weeks for an account — Fix: Prepare everything up front, answer the same day
Bottom line
None of these are hard to fix. They're just easy to ignore.
Pick the one that stung. Fix that one this month. Only that one. Then pick the next.
FAQ
What's the most common finance mistake for a new GmbH?
Mixing personal and company money. It's easy to do, and it creates bookkeeping and potential tax issues that take time to untangle.
Do I need to register for AHV when I hire my first employee?
Yes. Employers register with a compensation office and pay AHV/IV/EO and ALV contributions on salaries. In 2026, AHV/IV/EO is 10.6% of salary (5.3% each) and ALV is 2.2% (1.1% each) up to CHF 148,200.
When does a Swiss company need a pension fund (BVG)?
When an employee earns at least the BVG entry threshold, which is CHF 22,680 a year in 2026. The coordination deduction is CHF 26,460, and mandatory cover goes up to a salary of CHF 90,720.
How long do Swiss companies have to keep records?
Ten years from the end of the financial year (OR Art. 958f). For VAT, real-estate records can need keeping for up to 26 years.
Should a small company have accounts in several currencies?
If you regularly earn and spend in EUR or USD, yes. It avoids paying conversion costs twice.
Fix most of this list in one place
Firma brings multi-currency accounts (USD, EUR, CHF, GBP, CAD, MXN, BRL), payments by Swiss QR, SEPA, SWIFT and more, payroll with AHV/AVS and second-pillar handling, and expense management into one place. Accounting integrations are coming soon. Verification takes about two days, and if we can't verify your company, there's nothing to pay.
Also read: How to Pay EU Suppliers from a Swiss GmbH (SEPA vs SWIFT), The QR-Bill, Explained for Busy Founders and How a Swiss Company Can Receive USDC (and What to Do Next).
This article is general information, not legal, tax, or investment advice. Talk to a qualified adviser about your situation.
Firma is a regulated financial technology company, not a bank. Banking services are provided through banking partners. Balances are digital stablecoin tokens, not bank deposits, and are not covered by esisuisse.
Sources: Federal Social Insurance Office, amounts valid from 1 January 2026; AHV/IV information centre; Federal Tax Administration, VAT; Swiss Code of Obligations (Art. 958f); Withholding Tax Act (VStG) and VAT Act (MWSTG) on fedlex.admin.ch.
