Muss ich meine Daten selbst an TrustFIN schicken?

Nein. Sobald du TrustFIN als Treuhänder in einzly aktivierst, werden alle relevanten Daten (Rechnungen, Ausgaben, Belege, MWST, AHV) automatisch über eine sichere API-Schnittstelle bereitgestellt. Du musst nichts exportieren oder mailen.

Wie sicher sind meine Daten?

Sehr sicher. Die Daten werden nur an TrustFIN übertragen wenn du den Treuhänder-Zugang explizit aktiviert hast. Die Verbindung erfolgt über eine authentifizierte API. Alle Daten werden in Swiss Cloud gehostet und sind durch 2FA geschützt.

Was kostet die API-Verbindung zusätzlich?

Nichts. Die Verbindung zwischen einzly und TrustFIN ist für alle einzly-Kunden kostenlos. Du zahlst nur einzly (CHF 15/Monat) und das gewählte TrustFIN-Paket.

Was ist wenn ich bereits einen Treuhänder habe?

Du kannst jederzeit wechseln. TrustFIN hilft dir beim Onboarding. Die Daten aus einzly sind bereits vollständig strukturiert — ideal für einen reibungslosen Wechsel.

Werden Belege automatisch übertragen?

Ja. Jeder Beleg den du mit dem KI-Belegscanner in einzly scannst, wird automatisch mit der dazugehörigen Ausgabe verknüpft und TrustFIN zugänglich gemacht.

Unterstützt das auch MWST-Pflichtige?

Ja. Die MWST-Abrechnungen werden automatisch quartalsweise oder halbjährlich berechnet und TrustFIN übermittelt.

Kann ich TrustFIN jederzeit kündigen?

Ja. Du kannst den Treuhänder-Zugang in den einzly-Einstellungen jederzeit widerrufen.

einzly × TrustFIN

Tax return for sole proprietors. Fully automated.

You handle the bookkeeping in einzly. TrustFIN files your tax return — directly from your data. No emailing receipts, no follow-up questions, no March panic.

Choose a package How it works

Certified Swiss accountants. Data stays in Switzerland.

einzly

Buchhaltung

Rechnungen47

Ausgaben183

Belege287

MWST Q2✓

FIN.

Steuerexperte

Live

Einnahmen143kAusgaben23kMWST8.3kGewinn119kAHV11k

Empfangen

517

Rechnung R-2026-046

Beleg · EWZ 20.10

MWST Q2 2026

Ausgabe · SBB 590

Sichere API

DIY tax return

You're leaving money
on the table every year.

Swiss tax law for sole proprietors is complex. If you don't know all the deductions, depreciation rules and allowances, you automatically pay too much.

What can you actually deduct?

Home office allowance, vehicle costs, meals, training, insurance, pillar 3a — the list is long. If you don't know it, you overpay.

Depreciation & private use

How much can you depreciate on a business vehicle? What's the private use share? Which equipment over which years? Get it wrong and the tax office corrects it.

VAT, AHV, input tax

Effective method or flat rate? Input tax deduction on private use? AHV advance correctly declared? One detail wrong costs you hundreds.

With einzly × TrustFIN, you get out what's actually in there.

TrustFIN knows every deduction, every depreciation, every Swiss specialty. einzly delivers the data. You save — legally and verifiably.

Klassisch

Jeden Monat 3 Stunden.

Belege sammeln

Scannen

Sortieren

E-Mail senden

Warten

Rückfragen

Wieder schicken

Pro Monat

~3 h

Jahresende: Stress, Mahnungen, Mehrkosten

einzly × TrustFIN

Einmal einrichten. Vergessen.

Auto Sync aktiv

Automatisch · keine Klicks

Alle Daten in Echtzeit

Treuhänder sieht alles live

Pro Monat

0 min

Jahresende: Steuererklärung ready

Seamless data transfer

Your einzly data
becomes your tax return.

No upload. No export. No email attachment. TrustFIN gets exactly the data needed for your tax return via API — directly from your bookkeeping.

Income, expenses, receipts — all automatic

VAT + EAR ready at year-end

AHV payments pulled from expenses

Secure API — no emails, no dropboxes

einzly

SBB AG
Hauptbahnhof Zürich
09.04.2026 · 14:27
GA 1. Klasse
MWST 8.1%
CHF 590.00

Lieferant...

Betrag...

MWST...

Kategorie...

Gespeichert · Sync läuft

API

FIN. Dashboard

Idle

Ausgaben

23'410

+590

Belege

287

+1

SBB AG

NEU

09.04.2026 · ReisespesenCHF 590.00

Letzte Buchungen

Microsoft 365CHF 12.50

Netlify ProCHF 7.15

EWZ StromCHF 20.00

What gets transferred

Everything your tax return
needs is already there.

TrustFIN automatically gets access to all tax-relevant data from your einzly bookkeeping. Nothing forgotten. Nothing manual.

Revenue

All invoices, direct income, payment methods and foreign currencies — including Stripe and TWINT transactions.

Expenses with receipts

Every expense with supplier, category, VAT rate and the scanned receipt attached.

VAT statement

All ESTV figures quarterly or semi-annually — by effective method or flat rate.

Year-end closing

Income-expense statement with net profit, category breakdown and monthly overview.

AHV payments

Actual AHV contributions from your expenses — real numbers, not estimates.

Receipts & documents

All scanned receipts, invoices and documents as structured files — directly linked.

How it works

Tax return ready in 3 steps

Setup in 5 minutes. In March you only wait for the confirmation.

Bookkeeping in einzly

You record your business in einzly: invoices, expenses, receipts. Like you'd do anyway — just easier.

Connect TrustFIN

One click in settings: enable TrustFIN as your accountant. Enter your AHV number. Done.

Receive your tax return

In March you receive the completed tax return from TrustFIN — based on your einzly data. You only need to confirm.

Your tax partner

Who is TrustFIN?

TrustFIN GmbH is a certified Swiss accounting service specialized in tax returns for sole proprietors. They know every legal deduction, every depreciation rule and every allowance — and get out what's actually in there for you.

Maximize legal deductions

Home office allowance, vehicle deductions, pillar 3a, insurance — TrustFIN finds every franc you can deduct.

Correct depreciation & private use

Business car, computer, furniture — TrustFIN calculates depreciation and private use shares per Swiss law. No corrections from the tax office.

VAT, AHV, input tax handled

Effective method or flat rate? Optimize input tax deduction? TrustFIN decides what's cheapest for you.

Flat rate & free consultation

No hourly billing. You know upfront what it costs. Initial consultation no obligation, free.

Learn more about TrustFIN at trust-fin.ch

Packages

Flat rates. No surprises.

Once a year for TrustFIN. CHF 15 monthly for einzly. That's it.

einzly

CHF 15/ month

The accounting software

TrustFIN

CHF 280/ Jahr

Your accountant

Basic

CHF 280/ year

Tax return with automatic data sync from einzly. The essentials, fairly priced.

einzly auto-sync (all data live)
Sole proprietor tax return
Deadline extension included
Digital filing

Choose package

Total CHF 460/year

Tax return for sole proprietors. Fully automated.

You're leaving money
on the table every year.

What can you actually deduct?

Depreciation & private use

VAT, AHV, input tax

With einzly × TrustFIN, you get out what's actually in there.

Your einzly data
becomes your tax return.

Everything your tax return
needs is already there.

Revenue

Expenses with receipts

VAT statement

Year-end closing

AHV payments

Receipts & documents

Tax return ready in 3 steps

Bookkeeping in einzly

Connect TrustFIN

Receive your tax return

Who is TrustFIN?

Maximize legal deductions

Correct depreciation & private use

VAT, AHV, input tax handled

Flat rate & free consultation

Flat rates. No surprises.

Frequently asked

What deductions does TrustFIN find for me?

How does depreciation and private use work?

Do I have to send my data to TrustFIN myself?

What if I currently do my own tax return?

Is there an extra cost for the API connection?

Does TrustFIN also optimize VAT?

How secure is my data?

Save taxes without stress.
Automated. Legal. Swiss quality.

Tax return for sole proprietors. Fully automated.

You're leaving moneyon the table every year.

What can you actually deduct?

Depreciation & private use

VAT, AHV, input tax

With einzly × TrustFIN, you get out what's actually in there.

Your einzly databecomes your tax return.

Everything your tax returnneeds is already there.

Revenue

Expenses with receipts

VAT statement

Year-end closing

AHV payments

Receipts & documents

Tax return ready in 3 steps

Bookkeeping in einzly

Connect TrustFIN

Receive your tax return

Who is TrustFIN?

Maximize legal deductions

Correct depreciation & private use

VAT, AHV, input tax handled

Flat rate & free consultation

Flat rates. No surprises.

Frequently asked

What deductions does TrustFIN find for me?

How does depreciation and private use work?

Do I have to send my data to TrustFIN myself?

What if I currently do my own tax return?

Is there an extra cost for the API connection?

Does TrustFIN also optimize VAT?

How secure is my data?

Save taxes without stress.Automated. Legal. Swiss quality.

You're leaving money
on the table every year.

Your einzly data
becomes your tax return.

Everything your tax return
needs is already there.

Save taxes without stress.
Automated. Legal. Swiss quality.