Bookkeeping and Tax Advise from €99 per month
We are your dedicated expert who handles your bookkeeping, tax filings, and compliance — supported by smart software and AI insights that keep you in control.
Chat with us
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Fixed fee · Proactive support · Real-time insights
5/5
Bookkeeping and Tax Advise from €99 per month
We are your dedicated expert who handles your bookkeeping, tax filings, and compliance — supported by smart software and AI insights that keep you in control.
Chat with us
Button
Fixed fee · Proactive support · Real-time insights
5/5
Bookkeeping and Tax Advise from €99 per month
We are your dedicated expert who handles your bookkeeping, tax filings, and compliance — supported by smart software and AI insights that keep you in control.
Chat with us
Button
Fixed fee · Proactive support · Real-time insights
5/5
What Entrepreneurs say about us
“One of the things that impressed us most was their transparency and communication. We were kept in the loop at every stage of the project, with regular updates and clear reporting.”
Juan Manuel Faya
Partnerships Manager
“The best decision I made in my first year of business. I was overwhelmed with VAT deadlines and had no idea how bookkeeping really worked. Slim Finance got everything organised in the first week”
Michel Malek
M.D. & Founders @ Delphyr
Super proactive and always one step ahead. They don’t just react, they tell me what’s coming. I get reminders before anything is due, and they even caught a tax saving opportunity my old accountant missed. Highly recommend for small businesses.
Arlene Kurstnesov
Entrepreneur
"10/10. I switched over and never looked back. My previous accountant only contacted me once a year. Now I get monthly insight, fast replies and a dashboard that shows my real numbers. It’s a no-brainer. Highly recommend them"
Cameron Williamson
Stocking associate
"Great for busy founders who want clarity. I love that I can open the dashboard anytime and instantly see my P&L, expected taxes and tasks to do. It helps me make smarter decisions without waiting for quarterly updates."
Wendy Bogers
Founder @ Ligo
"Professional service. We highly recommend Slim for accounting and tax services for BV’s. Easy communication and quick action."
Cornelis Koning
Individual
"Perfect cooperation. Quick contact and easy bookkeeping. We recommend Slim."
Angela Schilder
Detailhandel
"Easy onboarding and perfect insight in results. We love the hands-on and digital bookkeeping by Slim.
Anna Tuijp
Zzp'er
Running a business is hard enough. Your books shouldn’t be.
Running a business is hard enough. Your books shouldn’t be.
Running a business is hard enough. Your books shouldn’t be.
We take bookkeeping, VAT, and tax off your plate — while giving you a clean dashboard, real-time reports, and proactive guidance whenever you need it.
Our bookkeepers do all the admin for you
Real humans, not ticket systems. Your bookkeeper knows your business, understands your situation, and keeps your books clean, accurate, and up-to-date. Ask anything — we’re here to help.
Monthly & Yearly bookkeeping
We proactively work on your books to keep everything up-to-date.
Same day replies
We reply to all your questions fast via chat, phone and email.
Our bookkeepers do all the admin for you
Real humans, not ticket systems. Your bookkeeper knows your business, understands your situation, and keeps your books clean, accurate, and up-to-date. Ask anything — we’re here to help.
Monthly & Yearly bookkeeping
We proactively work on your books to keep everything up-to-date.
Same day replies
We reply to all your questions fast via chat, phone and email.
Our bookkeepers do all the admin for you
Real humans, not ticket systems. Your bookkeeper knows your business, understands your situation, and keeps your books clean, accurate, and up-to-date. Ask anything — we’re here to help.
Monthly & Yearly bookkeeping
We proactively work on your books to keep everything up-to-date.
Same day replies
We reply to all your questions fast via chat, phone and email.
We optimise your taxes and never miss a deadline
We categorise your transactions every week, monitor deadlines, flag anything unusual, and proactively look for tax-saving opportunities throughout the year — not just in December.
Take advantage of every deductible expense
Take advantage of every deductible expense
Take advantage of every deductible expense
Uncover refunds you might be missing
Uncover refunds you might be missing
Uncover refunds you might be missing
Minimise taxes for you as an entrepreneur
Minimise taxes for you as an entrepreneur
Minimise taxes for you as an entrepreneur
Optimizing Taxes for more cash in your pocket
Proactively monitoring expenses, allowances and movements with you to save you money
Optimizing Taxes for more cash in your pocket
Proactively monitoring expenses, allowances and movements with you to save you money
Optimizing Taxes for more cash in your pocket
Proactively monitoring expenses, allowances and movements with you to save you money
“We were able to provide all financial information for the Due Dilligence upon an exit in a day thanks to Slim"
Wendy Bogers
Founders @ Ligo
We give you real-time insights of your business
Your dashboard gives you cash flow, expenses, expected taxes, and smart AI insights so you always know where your business stands, day or night.
Clear numbers, zero guesswork
See cash flow, expenses, and upcoming taxes instantly — no spreadsheets, no waiting.
On-demand reporting with Slim AI
Chat with your AI assistant to understand cash flow, taxes, trends, and next steps — in real time and plain language.
Fixed monthly fee — no 'hourly' surprises
Simple, transparent pricing. One predictable monthly fee covers bookkeeping, support, VAT, reporting, salary administration and all the essentials. No hourly billing. No unexpected 'advice' invoices.
All included
All included
All included
Never pay for questions.
Never pay for questions.
Never pay for questions.
No ‘custom work’ excuses.
No ‘custom work’ excuses.
No ‘custom work’ excuses.
With a 98% client satisfaction, you have peace of mind
We keep your books up-to-date, clean, and give you constant insights on where you stand to scale faster.
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We help entrepreneurs stay organised, compliant, and financially confident — year after year.
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Entrepreneurs love our mix of human expertise and modern tools. Fast responses, clear answers, no stress.
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A bookkeeper who knows your business and replies fast — always there all year-round when you need help.
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With deep accounting and tax experience, we guide you safely through every deadline and decision.
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We help entrepreneurs stay organised, compliant, and financially confident — year after year.
0
0
A bookkeeper who knows your business and replies fast — always there all year-round when you need help.
0%
0%
Entrepreneurs love our mix of human expertise and modern tools. Fast responses, clear answers, no stress.
0
0
With deep accounting and tax experience, we guide you safely through every deadline and decision.
0+
0+
We help entrepreneurs stay organised, compliant, and financially confident — year after year.
0%
0%
Entrepreneurs love our mix of human expertise and modern tools. Fast responses, clear answers, no stress.
0
0
A bookkeeper who knows your business and replies fast — always there all year-round when you need help.
0
0
With deep accounting and tax experience, we guide you safely through every deadline and decision.
Whether you're a 1 person or 100 people business, Slim does your admin.
Whether you're a 1 person or 100 people business, Slim does your admin.
Holding Structures
Professional bookkeeping for holding structures, investments, and dividend management.
Clean, compliant holdings' administrations
Clear separation of operating & holding finances
Optimised tax position across entities
BVs
Full-service financial management for active companies — from monthly reporting to payroll and VAT.
Accurate financial administration
Clear monthly insights for smarter decisions
Seamless handling of payroll, invoices & VAT
Personal Holdings
Empowering organizations to align talent with business goals through optimized team strategies.
Leadership Development Programs
Workforce Alignment & Planning
Culture & Performance Optimization
Individuals
Designing actionable roadmaps for businesses to scale sustainably and seize new opportunities.
Market Expansion Strategies
Revenue Growth Frameworks
Scalable Business Models
Holding Structures
BVs
Helping organizations identify vulnerabilities and safeguard assets with proactive, data-driven risk strategies.
Comprehensive Risk Audits
Compliance & Regulatory Alignment
Crisis Management & Prevention
Personal Holdings
Individuals
Holding Structures
BVs
Helping organizations identify vulnerabilities and safeguard assets with proactive, data-driven risk strategies.
Comprehensive Risk Audits
Compliance & Regulatory Alignment
Crisis Management & Prevention
Personal Holdings
Individuals
Frequently Asked Questions
Frequently Asked Questions
Frequently Asked Questions
Still have a question?
Our team is ready to assist you with anything you need.
What makes Slim Finance different from a traditional boekhouder?
How fast can I get started?
Fast — usually within 2 business days. We’ll schedule your onboarding call, connect your accounts, clean up your books (if needed), and get you fully operational quickly.
Is Slim Finance suitable for starters?
What if I’m behind on my bookkeeping or haven’t filed VAT in a while?
Do you work with both Dutch and English-speaking clients?
What makes Slim Finance different from a traditional boekhouder?
How fast can I get started?
Fast — usually within 2 business days. We’ll schedule your onboarding call, connect your accounts, clean up your books (if needed), and get you fully operational quickly.
Is Slim Finance suitable for starters?
What if I’m behind on my bookkeeping or haven’t filed VAT in a while?
Do you work with both Dutch and English-speaking clients?
What makes Slim Finance different from a traditional boekhouder?
How fast can I get started?
Fast — usually within 2 business days. We’ll schedule your onboarding call, connect your accounts, clean up your books (if needed), and get you fully operational quickly.
Is Slim Finance suitable for starters?
What if I’m behind on my bookkeeping or haven’t filed VAT in a while?
Do you work with both Dutch and English-speaking clients?
Ready to stop worrying about your books?
Schedule a Free Consultation
Discover Solutions
Get a solid administration in place
Ready to stop worrying about your books?
Schedule a Free Consultation
Discover Solutions
Get a solid administration in place
Ready to stop worrying about your books?
Schedule a Free Consultation
Discover Solutions
Get a solid administration in place