--- title: "Deductible Expenses in Corporate Tax: Complete Guide" url: https://grupoyour.com/en/blog/deductible-expenses-corporate-tax-guide description: "Complete guide to deductible expenses in Portuguese Corporate Tax (IRC). Learn what your company can deduct: personnel, vehicles, marketing and more." lang: en --- Saltar para o conteúdo Back to blog: https://grupoyour.com/en/blog IRC: https://grupoyour.com/en/blog?tag=irc Fiscalidade: https://grupoyour.com/en/blog?tag=fiscalidade Guia: https://grupoyour.com/en/blog?tag=guia PME: https://grupoyour.com/en/blog?tag=pme Despesas Dedutíveis: https://grupoyour.com/en/blog?tag=despesas%20dedut%C3%ADveis Contabilidade: https://grupoyour.com/en/blog?tag=contabilidade Tributação Autónoma: https://grupoyour.com/en/blog?tag=tributa%C3%A7%C3%A3o%20aut%C3%B3noma # Deductible Expenses in Corporate Tax: Complete Guide Image: Mónica Matos (https://grupoyour.com/images/authors/monica-matos.png) Mónica Matos: https://grupoyour.com/en/blog/author/monica-matos 29 March 2026· 3 min read Image: Deductible Expenses in Corporate Tax: Complete Guide por Mónica Matos - Grupo Your Contabilidade (https://xmvtahclopqwmxwnbimy.supabase.co/storage/v1/object/public/blog-images/grupo-your-despesas-dedutiveis-irc-guia-completo.jpg) If you have a company in Portugal, you know that Corporate Tax (IRC) is one of the biggest tax burdens you have to deal with. What many business owners don't know is that there are numerous expenses that can be deducted, significantly reducing taxable profit and, consequently, the tax to pay. In this complete guide, we explain everything you need to know about deductible expenses in Corporate Tax in Portugal - what you can deduct, what you can't, and how to make the most of available tax benefits (https://grupoyour.com/en/tax-benefits-simulator). ## What are Deductible Expenses in Corporate Tax? For Corporate Tax purposes, an expense is deductible when it is related to the company's activity, is essential for obtaining income, and is properly documented with an invoice in the company's name with its tax number. Simply put: a deductible expense is one that the tax authority accepts as a business cost, reducing the profit on which tax is charged. ## General Rules for Tax-Accepted Expenses - **Connection to business activity** - The expense must be related to the company's activity - **Adequate documentation** - Every expense must be supported by an invoice with the company's tax number - **Correct accounting (https://grupoyour.com/en/accounting) record** - Expenses must be correctly recorded in the company's accounts ## What Expenses are Deductible? ### 1. Personnel Costs Employee expenses are generally fully deductible: salaries, holiday and Christmas bonuses, Social Security contributions, training costs, and pension plan contributions. Use our business cost simulator (https://grupoyour.com/en/business-cost-simulator) to calculate the real cost of an employee. ### 2. Rent and Premises Rent, maintenance, utilities, insurance and adaptation works are deductible. ### 3. Vehicles and Transport Vehicle expenses are deductible but with limitations. Passenger vehicles are subject to acquisition cost limits. Fuel, tolls and maintenance are deductible when business-related. > **Note:** Vehicle expenses are frequently subject to autonomous taxation. Always consult your accountant (https://grupoyour.com/en/accounting). ### 4. Meals and Entertainment Meal allowances (up to legal limits), entertainment expenses (subject to 10% autonomous taxation), and client gifts (up to 0.5% of turnover) are deductible. ### 5. Marketing and Communication All promotional expenses are deductible: advertising, website, social media, promotional material, trade fairs and sponsorships. ### 6. External Services Accounting (https://grupoyour.com/en/accounting), legal, consulting (https://grupoyour.com/en/tax-consulting), cleaning, security and IT services are deductible. ### 7. Equipment and Depreciation Deduction is spread over the asset's useful life through depreciation: IT equipment, machinery, furniture, software and tools. ### 8. Interest and Financial Charges Bank loan interest, financing commissions, and leasing charges are generally deductible. ### 9. Insurance Liability, health (with conditions), equipment and workplace accident insurance are deductible. ### 10. Training and Development Professional training expenses are deductible and may benefit from tax enhancement. ## What is NOT Deductible? - Fines and penalties from public entities - Corporate Tax itself - Undocumented expenses - Personal expenses of partners/managers - Donations outside the legal patronage regime - Vehicle costs above legal limits - Confidential expenses - taxed at 50% ## Autonomous Taxation Additional rates on certain expenses: entertainment (10%), passenger vehicles (variable rates), undocumented expenses (50%), per diems (5%). Use our IRC simulator (https://grupoyour.com/en/irc-simulator) to calculate the impact on your company's tax. ## Practical Tips - Always keep all invoices - Ensure invoices are in the company's name - Plan ahead throughout the year - Invest in training and technology - Always consult a certified accountant Discover available tax benefits (https://grupoyour.com/en/tax-benefits-simulator) for your company. ## Frequently Asked Questions **Can I deduct personal phone expenses used for work?** Only if the contract is in the company's name. **Are client meals always deductible?** Yes, but subject to 10% autonomous taxation. **What about business travel abroad?** Yes, if properly documented. Use our per diem simulator (https://grupoyour.com/en/per-diem-simulator) to calculate exempt amounts. ## Conclusion Knowing Corporate Tax deduction rules is essential for efficient company management. At Grupo Your, we help businesses of all sizes optimise their tax situation. Contact us (https://grupoyour.com/en/contacts) to find out how we can help. _This article is for informational purposes and does not replace advice from a certified accountant._ ### Get the latest tax news Subscribe to our newsletter and receive articles, tax alerts and tips directly in your inbox. ### Need help with your company? Talk to us and receive a proposal tailored to your business. Company Formation: https://grupoyour.com/en/company-formation Accounting: https://grupoyour.com/en/accounting Payroll: https://grupoyour.com/en/payroll Tax Consulting: https://grupoyour.com/en/tax-consulting ### More on IRC View all (https://grupoyour.com/en/blog?tag=irc) #### New Autonomous Taxation Simulator 2026 Calculate how much your company pays in autonomous taxation on vehicles, representation, per diems and more. 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And I Still Believe in People. https://grupo-your.lovable.app/pt/blog/grupo-your-agente-ia-acreditar-pessoas Authors ## Meet Our Authors See all (https://grupoyour.com/en/blog/authors) ### Bruno Rodrigues Chief Operating Officer 14 articles https://grupoyour.com/en/blog/author/bruno-rodrigues ### Hélder Costa Chief Financial Officer 19 articles https://grupoyour.com/en/blog/author/helder-costa ### Mónica Matos Partner 21 articles https://grupoyour.com/en/blog/author/monica-matos ### Pedro Flores CEO of Grupo Your 156 articles https://grupoyour.com/en/blog/author/pedro-flores ### Sandra Lourenço Chief Human Capital, Marketing & Sales Officer 5 articles https://grupoyour.com/en/blog/author/sandra-lourenco See all authors: https://grupoyour.com/en/blog/authors By browsing this site you agree to our Terms and Conditions (https://grupoyour.com/en/terms-conditions). Please also see our Privacy and Data Protection Policy (https://grupoyour.com/en/privacy-policy) and Cookie Policy (https://grupoyour.com/en/cookie-policy). ## Structured data ```json [ { "@context": "https://schema.org", "@type": "Article", "headline": "Deductible Expenses in Corporate Tax: Complete Guide", "description": "Complete guide to deductible expenses in Portuguese Corporate Tax (IRC). 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