DIAN Support Document: How to Deduct Expenses When Hiring Services Without an Invoice in Colombia

It is a daily scenario in Colombia: you hire an expert plumber to fix a leak in a rented apartment, a technician to fix your office computers, or a freelance designer for a specific project. The work is perfect, but when it comes time to pay and ask for the invoice for your accounting, the response is the same: "Sorry, I don't issue an electronic invoice because I am an individual not required to do so.".

A few years ago, a simple paper collection account was enough to justify the expense. However, under the current tax framework, the collection account alone does not allow you to deduct that cost on your income tax return. To avoid losing that tax benefit or assuming extra taxes, the legal solution is to issue the Support Document for Acquisitions Made from Subjects Not Required to Issue a Sales Invoice (DSNO).

What is the Support Document for non-invoice issuers and what is it for?

The Support Document is the official proof that you, as the buyer or contractor, create to back up the purchase of goods or the provision of services carried out by a supplier who is not legally required to issue an electronic invoice or equivalent document (according to Article 771-2 of the Tax Statute).

Unlike a traditional sales invoice—where the seller issues the charge—in the Support Document, the flow is reversed: it is the buyer who generates the XML record and transmits it to the DIAN (or keeps it physically if they are not an electronic biller) to provide formal evidence of the cost or deduction.

A key point that generates a lot of unfounded fear is the belief that issuing this document automatically makes you an electronic biller for your own sales. The DIAN regulations are clear: generating a Support Document to justify an expense you had does not change your tax regime nor does it require you to electronically bill your income.

How to issue the Support Document according to your accounting profile

The procedure for processing the Support Document varies depending on whether you are already enabled as an electronic biller with the DIAN or if you are an individual or business not required to invoice sales.

1. If you are an Electronic Biller (OFE)

If your company or your independent activity already issues an electronic invoice, you are required to generate the Support Document electronically (XML with CUDS code) and transmit it to the DIAN for prior validation:

• Request the numbering resolution: Log in to the DIAN Muisca portal, go to "Billing Numbering," and request an exclusive resolution for the document type "Support Document for Acquisitions from Non-Obligated Subjects". Define a prefix and the desired range.
• Associate the numbering to your software: Associate the prefix on the free DIAN platform or in your preferred accounting software.
• Frequency of issuance: According to the DIAN doctrine (Concept 006942), you can transmit the document for each operation on the same day as the service, or on a cumulative weekly basis per supplier, transmitting it within the week following the first transaction.

2. If you are NOT an Electronic Biller (NO OFE)

If you are an individual or landlord who does not issue electronic sales invoices, the law allows you to prepare the Support Document in physical format (paper or file) and keep it in your accounting records to support the costs on your personal income tax return, without the need for real-time digital transmission.

Checklist: Required data you must ask your contractor for

For the DIAN to validate your Support Document and for the cost not to be rejected in an audit, you must request the following data from the freelancer or technician before making the payment:

1. Updated RUT or identification document: Copy of the Unique Tax Registry (RUT) and their ID card or NIT.
2. Full names or company name: Exactly as they appear on their identity document.
3. Detailed description of the service: Specify the work performed (e.g., "Preventive maintenance of 3 desktop computers and hard drive replacement"). Avoid generic descriptions like "various services."
4. Date and total value of the operation: Breaking down the agreed value and withholding taxes if they apply according to the concept and your status as a withholding agent.

Remember to handle these documents responsibly. You can review our recommendations on how to ask for personal data and protect privacy to avoid risks of identity theft.

Practical examples in real life

To better understand the application of the Support Document, let's look at common day-to-day scenarios in Colombia:

• Property maintenance and repairs: You hire a painter or carpenter to fit out a space or home. Since they do not issue an invoice, you ask for a copy of their RUT, generate the Support Document for the agreed value, and back up the expense related to your rental income.
• Technical and technology services: When hiring a technician for the office, the DSNO is the legal way to record the payment when that provider is not required to invoice.
• Professional services of freelancers: Translators, designers, or consultants who are not required to invoice. If the contractor decides to formalize in the future, they can consult the guide for electronic invoicing for freelancers.

Common errors that invalidate your cost deduction

Making mistakes in managing the Support Document can lead the DIAN to deny the deduction:

• Using the wrong document type: Selecting "Citizenship Card" in the software when the provider appears on the RUT with a registered NIT can lead to technical rejections.
• Not requesting the numbering resolution on time: Trying to transmit the document with an expired range or without prior authorization from the Muisca platform.
• Grouping different providers in a single document: Weekly consolidation is only permitted for purchases made from the same provider, never to add up expenses from different people.

Frequently asked questions

❓ What happens if I hire someone who doesn't invoice electronically and I don't issue the support document?

You may lose the right to deduct that expense or cost from your income tax return to the DIAN. Regulations require an electronic invoice or an authorized Support Document to validate the cost.

❓ Does the Documento Soporte require me to start electronically invoicing my sales?

No. Issuing a Documento Soporte to justify an expense you had does not change your sales tax status or make you an electronic biller for your income.

❓ How do I request the numbering range for the Documento Soporte from the DIAN?

Log in to the Muisca portal with your user account, select the "Billing Numbering" option, and request a specific resolution for "Documento Soporte for Acquisitions from Non-Obligated Parties".

❓ Can I group multiple payments to the same independent contractor into a single Documento Soporte?

Yes. The DIAN allows for a document to be generated and accumulated weekly for each provider, provided it is transmitted within the week following the first transaction made.

❓ What data or documents must I mandatory request from the provider before paying them?

You must request a copy of their updated RUT or ID/NIT number, full names, a detailed description of the service provided, and the total value of the transaction.

❓ Does the process for numbering the Documento Soporte with the DIAN have any cost?

No. The request for the resolution and the assignment of the numbering range on the official DIAN Muisca portal is a completely free process.