Muslims should handle their finances according to Islamic teachings by adhering to the following principles:

1. **Avoiding Riba (Usury):** Muslims must refrain from engaging in interest-based transactions, as riba is strictly prohibited in Islam.

2. **Ethical Earning:** Income should be earned through halal (permissible) means, ensuring that business practices align with Islamic ethics and morality.

3. **Zakat (Charity):** Muslims are obligated to give Zakat, a portion of their wealth, to those in need, promoting social welfare and community support.

4. **Financial Responsibility:** Islam encourages prudent financial management, including budgeting, saving, and avoiding excessive debt.

5. **Transparency and Honesty:** Financial dealings should be conducted with honesty and integrity, avoiding deception and fraud.

6. **Investment in Beneficial Ventures:** Muslims are encouraged to invest in ventures that contribute positively to society and are compliant with Islamic values.

7. **Trust in Allah (Tawakkul):** Muslims are taught to place their trust in Allah while making efforts in their financial affairs, balancing reliance on divine support with responsible action.

By following these principles, Muslims can manage their finances in a way that aligns with their faith and contributes to their overall well-being and that of their community.