Learn about deductible expenses for the self-employed in 2026, how to justify them, and what tax obligations professionals must fulfill with the Tax Agency.
Deductible expenses for the self-employed in 2026 are one of the main issues that freelancers must review to correctly calculate their taxes and avoid problems with the tax authorities. Not all payments made during the year are deductible: they must be related to the business activity, properly documented, and recorded.
Proper management allows you to legally reduce your tax burden and avoid errors in quarterly and annual income tax returns.
What requirements must an expense meet?
For an expense to be considered deductible, it must generally meet the following requirements:
- To be related to economic activity.
- To be necessary or reasonable for carrying out the business.
- It must be justified by an invoice or other valid document.
- Be registered in the corresponding accounting or tax books.
- To have been effectively paid or accrued according to the applicable criteria.
The existence of an invoice is not sufficient on its own. In the event of an audit, the tax authorities may analyze whether the expense is truly related to the business activity and whether its amount is reasonable.
Main deductible expenses for the self-employed
Among the most common deductible expenses for the self-employed in 2026 are the following:
1. Professional materials and supplies
This may include expenses for office supplies, products needed to provide services, consumables, packaging, and other items used directly in the business.
It is advisable to keep receipts and avoid mixing personal purchases with professional expenses.
2. Office or workspace rental
Renting premises, an office, or a professional practice can be tax-deductible when it is used for business purposes. Certain associated expenses, such as utilities, insurance, or maintenance services, may also be deductible.
The rental agreement and invoices must correctly identify the property and, where applicable, the activity carried out.
3. Software programs and digital services
Software licenses, storage services, management tools, professional platforms, and billing systems may be tax-deductible if used for business purposes.
This is especially relevant for professionals who work online or provide services to clients in different jurisdictions.
4. Professional services
Fees for lawyers, tax advisors, managers, auditors, consultants and other professionals may be deductible when they are related to the business.
Certain bank charges, payment platform fees, and administrative services may also be included.5
5. Vocational training
Courses, seminars, conferences and training activities related to the activity may be deductible, provided there is a clear connection with the services provided or with professional updating.
It is advisable to keep the course program, the invoice and, if possible, a brief explanation of its relation to the activity.
6. Professional insurance
Certain policies linked to the activity may be deductible, such as professional liability insurance, premises insurance or specific coverages required to practice.
They should not be confused with personal insurance policies that do not have a direct relationship with economic activity.
7. Housing and teleworking expenses
Self-employed individuals who work from their home should pay special attention to tax requirements.
To claim the deduction, a portion of the home must typically be used for business purposes, and the area designated for work must have been properly reported. The deduction is calculated by applying the corresponding percentage to the portion used for business and, in the case of certain utilities, to the legally established percentage.
Expenses that can be analyzed include:
- Electricity.
- Water.
- Gas.
- Telephony.
- Internet connection.
- Community of owners.
- Home insurance.
- IBI, in the corresponding proportion.
It is not advisable to deduct all of these expenses when only part of the home is used professionally.
8. Vehicle, travel and trips
Expenses for vehicle, fuel, parking, transport and accommodation usually require particularly rigorous justification.
For expenses to be deductible, their connection to the business activity must be proven. In the case of vehicles, the deduction may be conditional upon their being used sufficiently or exclusively for professional purposes.
When traveling for work, it’s advisable to keep:
- Tickets and reservations.
- Accommodation invoices.
- Proof of payment.
- Agenda or professional call.
- Identification of the client or related project.
Personal expenses incurred during a business trip do not automatically become deductible expenses.
VAT and personal income tax: they are not the same
An expense may be deductible for personal income tax, VAT, or both taxes, but the same requirements do not always apply.
For example:
- To deduct VAT, there must be a valid invoice with the tax correctly itemized.
- To deduct the expense in the IRPF (Personal Income Tax), its relationship with the activity must be proven.
- Some expenses may be deductible for personal income tax purposes, but do not generate the right to deduct VAT.
- Partially professional expenses may be subject to limits.
For this reason, accounting and record books must accurately reflect each transaction.
Self-employed individuals with income from abroad
Professionals who receive payments from foreign clients or companies should also consider:
- The place where the service is provided.
- VAT location rules.
- The possible existence of withholding taxes at source.
- The agreement to avoid double taxation.
- The professional’s tax residence.
- Reporting obligations regarding foreign accounts or assets.
Receiving payment in a bank account located outside of Spain does not, in itself, determine where a self-employed individual must pay taxes. The important factors are tax residency, place of work, and the nature of the business activity.
Common mistakes
Among the most common mistakes are:
- Deduct personal expenses as if they were professional expenses.
- Do not keep the original invoices.
- Use a personal account for all activity.
- Deducting meals or trips without justifying their professional purpose.
- Applying incorrect percentages to housing expenses.
- Confusing deductible expenses with deductible VAT.
- Failure to declare income obtained from foreign clients.
- Do not review the information before submitting the quarterly reports.
These errors can lead to adjustments, interest, and penalties.
How to organize documentation
To properly manage deductible expenses for the self-employed in 2026, it is recommended to:
- Use a separate bank account for the activity.
- Save the invoices in digital format and organized by month.
- Note the professional reason for the questionable expenses.
- Reconcile invoices and bank transactions periodically.
- Review expenses before each quarterly tax return.
- Keep contracts, orders, emails and proof of payment.
- Check before deducting mixed or high-value expenses.
Good document organization facilitates daily management and allows for a better response to tax authority requests.
Conclusion
Self-employed deductible expenses in 2026 can legally reduce the net income of the activity, but only when they meet the tax requirements and are properly justified.
The connection to the business activity, the existence of an invoice, and proper accounting records are essential elements. Expenses for housing, vehicles, travel, mutual insurance, and foreign income require particularly careful analysis.
At TSR Group, a law firm in Barcelona, we advise self-employed individuals and professionals on taxation, deductions, quarterly obligations and defense against tax audit procedures.