Freelancing gives you the freedom to choose your clients, set your own schedule and grow your business on your terms. But it also comes with one unavoidable challenge: getting paid on time.
Whether a client has simply forgotten your invoice, is waiting to be paid themselves, or has agreed on a longer payment term, delays happen. That's why it's important to understand the legal deadlines for issuing invoices and the payment rules that apply in Spain—so you can protect your cash flow and know exactly what to do if a payment arrives late.
When do invoices need to be issued and paid in Spain?
If you're a freelancer registered as an autónomo in Spain, you generally need to issue invoices to private customers when the transaction takes place. When invoicing another business or autónomo, invoices must generally be issued and sent before the 16th day of the month following the transaction. For business-to-business (B2B) sales, the default legal payment deadline is 30 calendar days, although businesses can agree on a payment period of up to 60 calendar days.
TL;DR
- B2C invoices: Usually issued when the sale or service takes place.
- B2B invoices: Must generally be issued and sent before the 16th day of the following month.
- Payment deadlines: Businesses have 30 calendar days to pay unless another deadline (up to 60 days) has been agreed.
- Late payments: You may be entitled to statutory late-payment interest and a €40 recovery fee.
- Late invoices: Issuing invoices after the legal deadline can lead to tax and accounting complications.
- Xolo helps you stay compliant by automatically generating compliant invoices and keeping your bookkeeping organised.
How long does a client have to pay an invoice in Spain?
Unless you've agreed otherwise, businesses in Spain generally have 30 calendar days to pay an invoice.
Spain's Late Payment Law protects businesses and self-employed professionals against excessive payment terms.
For invoices between businesses or professionals:
- The default payment deadline is 30 calendar days.
- Businesses can agree on longer payment terms.
- Those terms generally cannot exceed 60 calendar days.
Private consumers aren't covered by these same statutory payment rules, so payment terms should be clearly stated in your contract or on the invoice itself.
Example
You complete a website project for another company on 10 September.
If your contract doesn't specify payment terms, your client should pay you by 10 October.
If you've agreed on a 60-day payment term, payment would instead be due by 9 November.
When do autónomos need to issue an invoice?
The deadline depends on who you're invoicing.
If your client is a private individual (B2C)
For most sales to consumers, the invoice should be issued when the transaction takes place.
This is the most common situation for freelancers working directly with private clients.
If your client is another business or autónomo (B2B)
If you're invoicing another company or self-employed professional, you generally have until the 16th day of the month following the month in which the transaction took place to issue the invoice.
Example
You complete work on 27 April.
Your invoice should generally be issued no later than 16 May.
When should you send the invoice?
For B2B invoices, the invoice should generally be sent before the same legal deadline used for issuing it.
Many freelancers confuse issuing an invoice with delivering it to the client.
Under the current rules, if you're invoicing another business or professional, the invoice should generally be both:
- issued before the 16th of the following month, and
- sent to the client before that same deadline.
Sending the invoice weeks after issuing it could create compliance issues and delay payment unnecessarily.
What happens if a client pays late?
You may be entitled to statutory late-payment interest and compensation for recovery costs.
Late payments are frustrating, but Spanish law gives businesses certain protections. Depending on the circumstances, you may be able to claim:
- statutory late-payment interest,
- a fixed €40 recovery fee, and
- additional reasonable debt collection costs where applicable.
Before escalating matters, it's usually worth following a practical process:
- Send a friendly reminder.
- Follow up with a formal payment request.
- Consider legal recovery if payment still isn't made.
In many cases, a polite reminder is enough to resolve the issue.
What happens if you issue an invoice late?
Issuing invoices after the legal deadline can create tax and accounting problems. Late invoices may:
- complicate your VAT (IVA) reporting,
- delay your bookkeeping,
- create inconsistencies in your tax returns, and
- increase the risk of questions from the Agencia Tributaria.
While occasional administrative mistakes happen, issuing invoices on time helps keep your records accurate and reduces unnecessary stress during tax season.
What about invoices to public administrations?
Invoices to Spanish public authorities are subject to additional requirements.
If you're invoicing a public administration, electronic invoicing requirements usually apply. Depending on the authority you're working with, you may need to submit invoices through the official electronic invoicing platform rather than sending a standard PDF by email.
Always confirm the invoicing requirements before starting work with a public-sector client.
What about electronic invoicing?
Mandatory B2B electronic invoicing is coming to Spain, but it isn't yet in force for all autónomos.
Spain is gradually introducing mandatory electronic invoicing for transactions between businesses and self-employed professionals. The rollout will happen in phases after the final technical regulations enter into force, meaning not every autónomo needs to switch immediately.
It's also worth noting that electronic invoicing is different from VeriFactu. While both are part of Spain's digital tax modernisation, they serve different purposes and have different implementation timelines.
If you're unsure how the upcoming rules affect your business, keeping your invoicing software up to date is the easiest way to stay prepared.
Best practices for getting paid on time
Clear invoices and good payment habits reduce late payments. A few simple habits can make a big difference:
- Send invoices as soon as you've completed the work.
- Include clear payment terms.
- Double-check your client's billing details.
- Add your IBAN and payment reference.
- Follow up shortly after the due date if payment hasn't arrived.
Many payment delays happen simply because an invoice was forgotten or sent to the wrong contact.
How Xolo helps autónomos stay compliant
Keeping track of invoice deadlines is one of many administrative tasks that come with being self-employed. With Xolo, you can:
- create compliant invoices,
- keep your bookkeeping organised,
- stay on top of tax obligations,
- receive support from English-speaking tax advisors, and
- spend less time on paperwork and more time growing your business.
Whether you're invoicing clients in Spain or internationally, having the right tools helps you stay compliant and avoid unnecessary administrative headaches.
Stay compliant without the paperwork
Keeping track of invoice deadlines, payment terms, IVA returns and tax obligations doesn't have to be complicated.
Xolo helps freelancers registered as autónomos in Spain manage invoicing, bookkeeping and taxes from one simple platform—so you can spend less time on admin and more time running your business.
👉 Learn how Xolo can simplify life as an autónomo in Spain.
FAQ
How long does a client legally have to pay an invoice in Spain?
For B2B transactions, the default legal payment period is 30 calendar days, unless another payment term has been agreed.
Can businesses agree to longer payment terms?
Yes. Businesses can generally agree payment terms of up to 60 calendar days.
When do I need to issue an invoice as an autónomo?
For private customers, invoices are generally issued when the transaction takes place. For businesses and other autónomos, invoices are generally issued before the 16th day of the following month.
Can I charge interest on overdue invoices?
In many B2B situations, yes. Spanish law allows statutory late-payment interest where the legal requirements are met.
Can I claim compensation for late payments?
Yes. Businesses may also be entitled to a fixed €40 recovery fee, in addition to statutory interest and certain recovery costs.
Is electronic invoicing already mandatory in Spain?
Not for everyone. Mandatory B2B electronic invoicing is being introduced gradually, so the timing depends on when the phased rollout applies to your business.