Drop your invoices. Get your BTW return. Done.

File your BTW before your coffee gets cold.

  • AI reads every invoice and assigns the right rubriek
  • Reverse charge & foreign currency — handled, explained
  • Same layout as the Belastingdienst form. You review, you file.
Get started See how it works

Built for eenmanszaak · You stay in control · Cancel anytime

Welcome back
Jens's overview
Q1Q2Q3Q4
Start filing
Q1 2026Due
You owe the Belastingdienst
€ 2.604,57
Quarterly trend
Revenue excl. VAT
€ 14.250,00
VAT on revenue · € 2.992,50
Income
VAT on revenue
€ 2.992,50
Rubriek 1a · 21%
To pay
Expenses excl. VAT
€ 1.847,30
Voorbelasting · € 387,93
Expenses
Input tax
€ 387,93
Rubriek 5b · deductible
To reclaim
The problem

The aangifte is short. Getting it right isn't.

Nine boxes. Simple enough — until an afternoon disappears into sorting invoices, a foreign supplier triggers a reverse-charge rule you've never heard of, and you press "Akkoord" hoping you got it right. A wrong box isn't a typo. It's a correction letter from the Belastingdienst.

BTW Helper handles all of it. And when you're not sure — just ask the AI.

AIThe built-in AI assistant answers — in Dutch, English, or Spanish. It reads your invoices, explains every classification, and never leaves you guessing.

Your AI companion

Not just software.
A BTW specialist.

Built on a frontier AI model. It reads your invoices, learns your business, explains every decision — and is always one question away.

Learns your business over time

It recognizes the vendors you use every quarter and remembers how they're classified. The more you file, the fewer questions it needs to ask.

Groups, classifies, flags — automatically

Recurring invoices grouped. Reverse charge applied. Anything unusual flagged for your review. You see the reasoning, not just the result.

Answers in your language

"Why this rubriek?" "What's next?" "Did I miss anything?" — ask in Dutch, English, or Spanish. It explains, you decide.

AI
BTW Helper · AI assistant
online
Why is this invoice rubriek 4a?
AI assistantThe supplier is based outside the EU and charged no VAT — so you self-assess 21% under the reverse-charge rule. That's rubriek 4a. Same as this supplier last quarter.
I have 14 invoices from the same vendor this year. Check each one?
AI assistantNo need — I've grouped them. Same vendor → same rubriek, every time. I'll only flag one if something looks different. All 14 are classified and ready.
Does BTW Helper file my return automatically?
AI assistantNo — and that's the point. I calculate every number. You paste them into Mijn Belastingdienst Zakelijk under your own DigiD. You stay in control of what gets submitted. Two minutes, with the simulator open next to the form.
Ask anything about your BTW...
How it works

Four steps. The AI does the heavy lifting.

You just review and file.

01

Drop the whole quarter

Drag in all your invoices at once — bulk upload, PDFs or email forwards. No one-by-one, no manual entry.

14 invoices.pdf
02

AI reads & classifies

14 invoices read, rubriek-tagged and vendor-grouped in ~20 seconds. Smart filters and a double-check pass flag anything unusual.

1a✓ 4a✓ 5b✓
03

Review & ask

A frontier AI model explains every call in plain language and learns your business over time — fewer questions, fewer errors, each quarter.

Why 4a? US vendor, no VAT → reverse charge
04

Copy into the portal

The one manual step: 9 boxes in Mijn Belastingdienst Zakelijk. The simulator mirrors it field for field — copy across, you can't get lost.

€46,20
The engine

Watch the AI read an invoice.

A real US invoice — reverse-charged and currency-converted. Every field, classified and explained.

INVOICE · #VRC-2026-0318
FromVercel Inc. · San Francisco, CA
ToJens de Vries · Amsterdam, NL
Date2026-03-18
Subtotal$20.00 USD
VAT$0.00 — not charged
Total$20.00 USD
Payment processed via card ending 4242
Vendor outside EU
→ reverse charge applies
$20.00 USD converted
→ €18,40 (×0.92)
No VAT charged
→ you self-assess 21% = €3,86
Classified · Rubriek 4a
reverse charge · €18,40 + €3,86 BTW
appears in 4a and 5b — nets to zero. Done.

Every invoice, explained like this. You see the reasoning — not just the result.

Everything in one place

Built for the whole quarter.

Not just a classifier — the full workflow, from invoice to filed.

AI invoice parsing

Drop a quarter's PDFs at once. The AI reads each one and assigns the correct rubriek — bulk upload, no manual entry.

Dashboard with alerts

Quarterly KPIs, trends, and what you owe — at a glance. Flags reverse-charge mismatches and unusual invoices before you file.

Filters & invoice count

Filter by rubriek, quarter, vendor, or type. See exactly how many invoices are in, classified, and ready — no surprises at the deadline.

Simulator = the real form

Same field order, same rubriek structure as Mijn Belastingdienst Zakelijk — just clearer, with explanations and copy buttons per field.

Deadline reminders

The quarter sneaks up on everyone. A nudge before the BTW deadline means no more last-evening panic.

You file, you control

BTW Helper prepares every number. You copy them into the portal under your own DigiD. Nothing gets submitted without you.

What you get back

Faster. Cheaper. In control.

The AI does the sorting and the math. You do the deciding.

180min
Filing time cut from hours to minutes
One quick review. One click to copy. Done.
0%
Guesswork removed from every classification
The AI shows its reasoning. You confirm, then file.
3languages
NL EN ES
Every rubriek explained in plain language
Reverse charge, ICP, voorbelasting — no jargon.
Where BTW Helper fits

One job. Done properly.

A full bookkeeping suite does everything — and asks you to become a bookkeeper to use it. A spreadsheet does nothing until you build it. BTW Helper does exactly one thing: your BTW, done right.

BTW Helper Full bookkeeping suite Spreadsheet
Built forBTW filing, end to endRunning your whole adminWhatever you set up yourself
Learning curveMinutesSteep — it's a full ledgerSteep & error-prone
AI that explains every callYesNoNo
Looks like the official formYesNoNo
Plain language · NL/EN/ESYesPartlyNo
No invoice capsYesPriced by volumeYes

← Swipe to see all columns →

BTW Helper isn't trying to replace your whole admin. It does one job — your BTW — better than a tool built for everything, and clearer than a spreadsheet built for nothing. And at year-end, it hands you a clean export of everything your accountant needs for your income-tax filing.

Gabz, founder of BTW Helper
Hi, I'm Gabz.

I run my own business in the Netherlands, and for years the BTW aangifte was the part of every quarter I dreaded most — an afternoon lost to sorting invoices, second-guessing rubrieken, and hoping I'd read the rules right.

So I built the tool I wished existed. It reads the invoices, explains every classification, and lays the numbers out exactly the way the Belastingdienst form expects them. The dread is gone — now it's a few minutes.

It works for me, every quarter. I built it so it works for you too.

— Gabz
Pricing

One job, done right.

No invoice caps, ever. Every quarter — Dutch or international — gets the same AI classification, the same reverse-charge netting, and the same ICP-opgaaf check. The €49 plan adds vendor memory and an accountant-ready export.

Essential
€39/quarter
  • Unlimited invoice uploads & AI classification
  • Dashboard, simulator, document library
  • The Helper — reads your real filing data and explains every classification
  • ICP-opgaaf reminder — flagged automatically when it applies
  • Reverse-charge netting handled and explained (4a/4b ↔ 5b)
Get started — Essential

Pay now, use immediately. If your first quarter doesn't work for your case — full refund, no questions.

Complete
€49/quarter
  • Everything in Essential
  • Vendor Pattern MemoryRecognizes your recurring vendors each quarter
  • Accountant Export BundlePDF summary + transaction CSV, ready to hand off
Get started — Complete

Pay now, use immediately. If your first quarter doesn't work for your case — full refund, no questions.

All prices excl. VAT. VAT may apply depending on your situation.
No invoice caps on any plan — upload as many as your quarter has.
No bank connection. BTW Helper works from your invoices.
No auto-filing. You copy, you submit, you stay in control.
One payment per quarter — no subscription, nothing to cancel.
Every quarter gets the full fiscal check — cross-border, reverse-charge, and ICP — no matter which plan you pick.
Questions

Good questions.

ClarityI don't have a fiscal background. Will I understand it?+
That's the whole point. Every rubriek and every field comes with a plain-language explanation — what it means, and why your invoice goes there. Available in Dutch, English and Spanish. You don't need to know the tax code; the AI walks you through it.
ControlDoes BTW Helper file my return for me?+
No — by design. BTW Helper calculates every number and lays it out ready to enter into Mijn Belastingdienst Zakelijk. You paste the figures yourself, under your own DigiD. No third-party authorization, no business verification step — you stay in control of what gets submitted, and it takes about two minutes.
AccuracyHow does it handle foreign invoices and reverse charge?+
Automatically. An invoice from a non-EU supplier with no VAT is converted to euro and self-assessed at 21% — rubriek 4a. EU B2B services map to the right rubriek too. The AI applies the rule and shows you the math for every line, so you can confirm rather than guess.
PrivacyWhat happens to my invoice data?+
Before you mark a quarter as filed, we prompt you to download your full records — your legal 7-year archive, saved to your own drive. After filing, we delete the invoice files from our storage. Your dashboard figures stay, but we don't hold onto your financial documents indefinitely.
ScopeCan I use this instead of full bookkeeping software?+
If you don't need a full ledger — client invoicing, payroll, multi-year accounts — yes. BTW Helper is built for one eenmanszaak that just needs its BTW done right, without the overhead of a full accounting suite. At year-end it also exports everything your accountant needs for your income-tax filing.
TrustHow accurate is the AI, really?+
It's built on a frontier AI model and shows its reasoning on every classification — nothing is a black box. A double-check pass flags anything unusual for your review, and you confirm before anything is filed. The AI does the heavy lifting; the final call is always yours.
CommitmentCan I cancel? Do I get a refund?+
There's no subscription to cancel — you pay once per quarter. And for your very first quarter: if BTW Helper doesn't work for your case, full refund, no questions.

Admin isn't your job.
Get back to it.

Drop your invoices. The AI does the rest. You stay in control.

Get started See how it works