In Portugal, invoicing compliance isn’t optional—businesses earning over €50,000 annually must use certified software. Building your own solution takes time, money, and ongoing updates, making it a costly distraction from growing your business.

The smarter move? Integrating a certified invoicing API that ensures compliance while saving time and costs. Let’s explore what to look for in the right solution—and why Space Invoices is the best fit for your business.

In this article, we are going to cover:

Portuguese Invoicing and Tax Guide

Portuguese Certified Invoicing API Benefits

Things to Look for in a Certified Invoicing API

Earn More and Pay Less with Space Invoices’ Invoicing API

 

 

Portuguese Invoicing and Tax Guide

Portugal initiated the modernization of its transaction processes in 2019 by implementing mandatory B2G e-invoicing for large companies, extending it to all B2G companies in 2021. Since 2020, businesses with an annual turnover of €50,000 or more have been required to use certified invoicing software. That means almost every business needs a provider of the invoicing feature, and since the compliance is mandatory, you have a limited pool of API’s to choose from. Building one is an option, however it takes more than a year, with constant regulations updates and many meeting to achieve certification, not to include sevelar developers salaries.

 

 

Portuguese Certified Invoicing API Benefits

All businesses with an annual turnover of €50,000 or more are required to use a certified invoicing feature. Integration API into your dashboard or website processes, streamlines the creation of tax-compliant and documents and invoices, with significant cost and time savings, eliminating the need to develop and constantly update your own invoicing feature. Let's explore some of the key benefits:

Compliance with Portuguese and International Regulations: Keeping up with frequent changes in tax and e-invoicing regulations, especially in Portugal, can be a substantial burden.

No more errors: The complexity of tax and invoicing regulations often leads to errors, particularly in manual invoicing. Using an invoicing API, however, eliminates errors, as the process is streamlined and constantly updated by the provider.

Time and Cost Efficiency: APIs offer a quick time to market, typically from a few weeks to a few months. They are also more cost-effective, requiring only a brief integration period and small monthly fees.

 

 

Things to Look for in a Certified Invoicing API

The integration time for an API varies, ranging from a week to a few months, enabling a faster time-to-market solution. Choosing the right API depends on your business needs, but it’s important to carefully evaluate key factors before integrating. Here’s what to watch out for:

Credibility – Ensure the API is certified by looking for badges or proof of certification. Since API development is complex, check for detailed documentation and a long track record of case studies to confirm reliability.

Customization – An ideal API should allow customization of documents, enabling you to modify designs, colours, and branding elements to maintain a consistent brand identity.

White-Labelling – Clients trust your platform. White-labelling ensures the invoicing feature looks and feels like an in-house solution, preventing scepticism and reinforcing trust.

Multitenancy – If you plan to offer invoicing to multiple users or clients, the API must support multitenancy, allowing everyone to issue invoices from the same API, while keeping their data private.

Support – Look for responsive customer support that assists with integration, troubleshooting, and questions. Strong support is a good indicator of a high-quality API.

Pricing – Ensure the API provider offers transparent and fair pricing with clear cost structures, avoiding hidden fees.

 

 

Earn More and Pay Less with Space Invoices’ Invoicing API

With Space Invoices’ Invoicing API, platforms looking to enhance their product offerings with invoicing capabilities can achieve this in less than a week and at a very low cost. This allows for a quicker time to market, enabling faster client acquisition and revenue growth.

Space Invoices is also a way to integrate a compliant and credible invoicing API in Portugal.

You will be able to:

Use Portuguese certified invoicing feature,

Have one API for current and future global tax and invoicing compliance;

Support and upsell your clients worldwide,

Ensure all documents are archived and successfully reported to responsible institutions;

Become a one-stop shop for current and future clients;

Streamline processes and eliminate manual errors, saving time and money.

Do you have questions about invoicing in Portugal?

We are ready to help.

 

Additional reading:

• 2030 Intra Community E-invoicing Mandatory EU ViDA
• 3 Best White-Label Invoicing APIs for B2B SaaS, Fintech, and Neobank Platforms
• Ask Your Developer: Key Insights for the Build vs Buy Debate in Invoicing API