When must I issue an invoice?

Within 15 days of the taxable supply date (Art. 71(1) EU VAT Directive / § 71(1) Slovak VAT Act).

What if the client does not pay?

After the due date you are entitled to statutory late-payment interest. You can enforce the invoice via a payment order or court proceedings.

Is an electronic invoice as valid as a paper one?

Yes. An electronic invoice is fully valid, provided its authenticity and integrity are ensured throughout the 10-year archiving obligation.

What is a variable symbol?

A variable symbol is a numeric payment identifier that allows the recipient to match a payment to a specific invoice. We recommend using the invoice number as the variable symbol.

Freelancers & solopreneurs Invoice

Invoice for Freelancers & solopreneurs

The invoice is the last step of any project — and the most common place where money gets lost due to wrong formats, missing details, or disagreements about the total. Freelancers need an invoice that looks professional, meets legal requirements, and gets paid without follow-up questions. zipzipdoc generates a correctly filled invoice in seconds, with an e-signature if you need one.

Start free Document guide

GDPR compliant · EU-hosted

Freelancers & solopreneurs

As a freelancer or solopreneur, you spend valuable time editing templates, emailing documents, and waiting for signatures. zipzipdoc automates the whole process — a service agreement, NDA or invoice is ready in a minute, and your client signs it from their phone anywhere in the world.

Invoice

Create an invoice including VAT, company ID, taxable event date, due date and variable symbol. Send it directly to the client.

When to use a Invoice

After delivering goods or providing a service
For monthly billing of recurring services
When the client needs a tax document for VAT deduction
For advance payment before work begins

What you get

VAT and tax fields
Logo and branding
Due date and penalties
Send by email

Benefits for Freelancers & solopreneurs

Ready contract in 60 seconds via AI
Client signs on the phone in a few clicks
Audit trail and cloud archive

FAQ

Questions about Invoice

Supplier and buyer IDs, invoice date, taxable supply date, invoice number, description of supply, VAT base, VAT rate and amount, total amount payable.

How does zipzipdoc compare to alternatives?

See detailed comparisons with popular e-signature tools.

zipzipdoc vs Signeasy zipzipdoc vs Dropbox Sign zipzipdoc vs PandaDoc

Back to Freelancers & solopreneurs · Guide: Invoice

Try Invoice for Freelancers & solopreneurs

14 days free, no card.

Start free Pricing

No credit card · 14 days free · Cancel anytime