📈 SmartWerk Tax Calculator

Who it’s for: Freelancers (ZZP), self-employed professionals, and small business owners in the Netherlands.

What it does: Calculates your estimated taxes based on Dutch rules, including KOR, ZZP discounts, MKB, startersaftrek, and income brackets. Supports scenarios like part-time, low/high income, and auto-deductions.

How to use: Enter your income, hours, VAT status and other details — the calculator will break down deductions and show net income. Optionally export the report or discuss with your bookkeeper.

Step 1: Your Data

Company Name: Email / Phone: Period Hours Worked: Hourly Rate (EUR): Total Income (auto): KvK Number: VAT Number: IBAN: Contact Person: Reporting Notes (optional):

Step 2: Business Expenses

Transport & Vehicle Costs: (car, fuel, public transport, bike lease, etc.) Workspace & Rent Costs: (home office, coworking, energy, heating, etc.) Internet & Communication: (mobile, Wi-Fi, VoIP, domain, calls, etc.) Marketing & Advertising: (website, ads, design, campaigns, etc.) Business Gifts & Representation: (networking, client gifts, events, etc.) Study, Insurance & Misc: (courses, software, accountant, insurance, banking, etc.)

Step 3: Tax Options

KvK Registered? (required for most deductions) Worked ≥1,225 hours? (required for ZZP deductions) BTW Rate: (21% standard, 9% reduced, 0% exempt) Use KOR? (Small Business Scheme; exempts charging VAT)

Step 4: Result

Deduction Breakdown

ZZP eligibility: —

KvK status: —

KOR usage: —

—

Gross Income:

Total Expenses:

Taxable Profit:

ZZP Deductions:

MKB Exemption (12.7%):

Final Taxable Income:

Income Tax:

ZVW (5.32%):

BTW Amount:

Total Estimated Tax:

You saved (ZZP + MKB):

Net Income after Tax: