Bookkeeping for startups: the complete guide

What makes bookkeeping for a startup different?

Most accounting firms are built around tax cycles. For an established SME with stable revenue that works fine: you process the quarter, file the return and move on. A startup lives in a different rhythm. Your revenue, your costs and your assumptions change from month to month, and the decisions that matter (hire, extend runway, start a round) can't wait for a quarterly close.

That's why the useful question isn't only whether your books are correct, but how current they are. Bookkeeping that's three months behind is still bookkeeping, but you can't steer on it. It also shows: when an investor asks how much runway you have left, you either have the answer or you don't.

The second difference is vocabulary. A startup administration has to deal with things a corner shop doesn't: shares and a holding structure, convertible loans, deferred revenue on annual subscriptions, payment providers like Stripe or Mollie that pay out in batches, R&D hours for the WBSO scheme, and investor reporting. None of it is exotic, but it needs to be set up right from the start.

Legal form: sole proprietorship, BV or holding?

Your legal form determines which obligations you have, so it's where the administration starts. For a startup that wants to grow with investors, staff and shares, that's almost always a BV, often with a personal holding above it. Investors buy shares, and shares only exist in a BV or NV. A sole proprietorship can be a fine, cheap starting point if you're testing an idea on your own without funding plans.

A holding structure means two administrations: the holding and the operating BV, each with its own filings and its own annual accounts. The flows between them (the management fee and the current account) have to match on both sides, which is exactly where it tends to go wrong when nobody keeps an eye on it.

• Sole proprietorship: no separation between business and private assets, taxed in income tax, no shares.
• BV: a separate legal entity, corporate income tax, a mandatory director-shareholder salary and the only route to investors.
• Holding above the operating BV: shares and built-up value in the holding, business risk in the operating company, two administrations.

Which obligations and deadlines apply?

Most of the administrative year is fixed in advance. These are the recurring obligations of a Dutch startup with a BV. They're not difficult individually; the risk is in forgetting one.

• VAT return: usually quarterly, filed and paid by the last day of the month following the quarter.
• Payroll taxes: as soon as you have staff or pay yourself as director-shareholder, per payroll period, usually monthly.
• Corporate income tax: filed after the financial year, in principle within five months of year-end unless you have an extension.
• Annual accounts: every BV files with the KVK, regardless of revenue. Most startups qualify as micro, so a limited version suffices. The outer deadline is twelve months after the end of the financial year.
• WBSO (if you use it): record R&D hours within ten working days, keep the project administration up to date and file the mandatory notification by 31 March of the following year.

Setting up your administration: from receipt to booking

A startup administration that stays current is mostly a matter of setup. Once your bank feeds, your billing tools and your payment providers are connected to your bookkeeping platform, the bulk of the work happens by itself and what's left is checking and classifying. Founders who keep doing it manually in a spreadsheet don't lose the overview because they're sloppy, but because the volume outgrows the method.

Two things are worth doing properly at the start. First, keep your business and private accounts strictly separate, especially with a BV: a private payment from the business account creates a current-account position you'll have to unravel later. Second, be consistent in how you file things, so that a month later you (or anyone else) can still see what a booking was.

• Connect your business bank accounts so transactions come in automatically.
• Send receipts and invoices in digitally, by app or email, instead of collecting them in a shoebox.
• Connect your billing and payment tools (Stripe, Mollie, Adyen, your invoicing software).
• Set booking rules for recurring costs, so classification doesn't have to be done by hand every month.
• Reconcile against your bank balance regularly, so an error surfaces in days rather than at year-end.

From administration to insight: the numbers you steer on

An administration only becomes useful when it produces numbers you actually use. For most startups a small set does the work: what's coming in, what's going out and how long that lasts. If those three are current every morning, you don't need a monthly report to know where you stand.

That same data is what an investor reads. Not because they doubt your product, but because your administration says something about how you run the company. A round or a due diligence goes noticeably faster when the numbers are already there instead of being reconstructed in a weekend.

• Cash position: what's in the account right now.
• Burn: what you net spend per month.
• Runway: how many months you have left at the current burn.

What does bookkeeping for a startup cost?

There are two pricing models: hourly, or a fixed monthly fee. For a startup the difference is bigger than it looks, because with hourly billing your invoice grows with every question you ask, exactly in the phase when you have the most questions. What determines the price is your legal form, your volume, whether you have staff and above all what's actually included.

So when you compare quotes, don't compare the monthly fee but the scope. Are the VAT and corporate tax returns included? The year-end close? A formal set of annual accounts? Are there setup costs? Two offers at the same price can cover completely different work.

How do you choose a bookkeeper?

The practical question isn't bookkeeper or accountant, but what you need now. A bookkeeper keeps your administration current and files your returns. An accountant provides assurance (an audit or a compiled set of annual accounts) and advice. Most early-stage startups need the first continuously and the second occasionally.

Beyond price, three things matter: how current your books are kept, how quickly you get an answer to a question about your own figures, and whether the party understands your world (runway, MRR, an investor update). Switching is less work than most founders expect: the migration runs in parallel with your current bookkeeper, so nothing has to stop.

What a bookkeeper does and does not do for you

It saves everyone time to be explicit about scope. Our work is your administration, your filings, the year-end close and your reporting. We make sure your figures are correct, current and readable, so that you can steer on them and an investor or bank can rely on them.

What we don't do is advise. Strategic and financial advice, tax planning, valuation and financing questions are a different profession with different responsibility, and they aren't part of our plans. If you run into a question like that, we say so rather than improvising, and we can point you to a party that does it for a living.

• We do: bookkeeping, VAT, payroll taxes and corporate tax returns, the year-end close, dashboards and investor reporting, payroll, and the administrative side of WBSO.
• We don't: strategic or financial advice, tax planning and structuring, valuations, financing advice, and the formal audit of annual accounts.

How it works at De Startup Accountant

We keep your books current every day instead of per quarter, on one automated platform, with a fixed point of contact who knows your administration. You see your cash position, burn and runway in a real-time dashboard, and your reporting is ready whenever an investor, a bank or a due diligence asks for it.

A full switch takes five working days. We take over your current bookkeeping, connect your accounts and tools, import your historical data and set up your dashboards, in parallel with your current bookkeeper so nothing stops in the meantime.

• Fixed monthly fees per entity, based on your invoice volume: Starter 0 to 75, Growth 76 to 125, Scale 126 to 200 invoices per month.
• The full year-end close is included in every plan; a formal (accountant-reviewed) set of annual accounts is an optional add-on at an agreed fee.
• Payroll always costs 20 euros per employee per month, payslips and payroll tax return included.
• No setup costs: onboarding and migration are part of your monthly fee.