Knowledge base
Practical guidance on quotes, invoices and VAT
Guides, terms and examples for business owners, in plain language. This is general information and not advice.
Guides
How to write a good quote: structure, example, tips
What belongs in a quote, how long it stays valid and how to write it so your client finds it easy to say yes.
Read more Guide · 6 min readWhat must a Dutch invoice contain? Requirements explained
All mandatory details on a Dutch invoice, with an example, a checklist and the retention period.
Read more Guide · 7 min readPreparing your Dutch VAT return as a small business
Which figures you need for your Dutch VAT return, which deadlines apply and what you can check beforehand.
Read more Guide · 6 min readAsking for a deposit: how much and how to invoice it
How much deposit you can ask for, how to put it in your quote and how to invoice it and offset it, including VAT.
Read more Guide · 6 min readWhat is a subscription in your bookkeeping? Explained
How to record, invoice and track a subscription, maintenance contract or retainer in your records.
Read more Guide · 7 min readWhen is an electronic signature valid? The EU rules
The three levels of electronic signature in the EU, when a simple one is enough and which evidence to keep.
Read more Guide · 8 min readInvoicing abroad: Dutch VAT and reverse charge
Which VAT you charge to business clients in the EU and beyond, when you reverse charge the VAT and what goes on the invoice.
Read more Guide · 6 min readMoving from Excel to a business portal: a practical guide
When Excel is no longer enough for quotes and invoices, what to take with you and how to switch calmly.
Read more Guide · 6 min readHaving a quote signed online: what your client does and what you record
What your client sees when approving online, which evidence you keep and how to avoid the usual hiccups.
Read more Guide · 8 min readInvoice not paid: what you can do, step by step
From checking and a friendly reminder to a formal notice, interest and collection, and how to prevent late payment.
Read more Guide · 6 min readA payment link on your invoice: what it saves and what to watch for
How a payment link with iDEAL works, what it saves, what it costs and what to watch for.
Read more Guide · 6 min readFollowing up on a quote without nagging: when to call and when to e-mail
A fixed schedule for following up on quotes, with example messages and a polite way to close.
Read more Guide · 6 min readKeeping invoices: how long and where?
How long to keep invoices, the exceptions, where to store them safely and what applies to quotes and proof.
Read more Guide · 6 min readRecurring invoices for hosting and maintenance
How to set up recurring invoices, with a fixed day, the period on the invoice, price rises and pausing.
Read more Guide · 7 min readERP or business portal: what fits your business?
When you need an ERP, when a business portal for quotes and invoices is enough and how they can work together.
Read moreFeatures explained
Quotes and e-signing
Build a quote in your own branding, send it with a personal link and see the moment your client agrees.
Read moreInvoices and payments
Create invoices from an accepted quote and let clients pay by iDEAL when you connect Mollie.
Read moreSubscriptions
Have the portal prepare a draft invoice every month, quarter or year for hosting, maintenance or advice.
Read moreReports and VAT
Six reports on your sales and a VAT summary per quarter, to prepare your return.
Read moreExact, OneDrive and Mollie
Copies of your invoices to Exact Online and OneDrive, email through Microsoft 365 and iDEAL through Mollie. You connect them yourself.
Read moreArchive and retention
Archive with a reason, restore with a click and set retention periods. The portal never deletes an invoice.
Read morePresentation mode
Show the portal to a client without showing your own records. Names are made up, amounts are scaled and saving is blocked.
Read moreBranding and languages
Your logo, colour, terms and texts on every document, in Dutch or English. You set it all up yourself.
Read moreThe portal emails quotes, invoices, reminders and notifications from your own Microsoft 365 address, in Dutch or English.
Read moreMore help
Glossary
Short explanations of terms such as iDEAL, reverse-charge VAT and retention period.
Read moreIntegrations
What Avsaro works with: Exact Online, Mollie, Microsoft 365 and OneDrive.
Read moreIndustries
What the chain looks like for IT, construction, creative agencies, advisers and care.
Read moreFrequently asked questions
Answers to what business owners ask us.
Read more
Try Avsaro yourself, or let us show you
Try it yourself for 30 minutes in your own environment with sample data, or request a call. Avsaro costs a one-time 995 euros and then 150 euros per month, both excluding VAT, including hosting and about two hours of support per month.
Enter your name and email and you are in your own demo straight away. After 30 minutes everything is wiped.