According to Beit Yosef, what is the ideal way to give tzedakah?

The ideal way to give tzedakah, according to Beit Yosef, is to give one-fifth of one's wealth based on what is needed. This approach reflects an understanding of balancing generosity with the financial obligations one may have. The halachic principle acknowledges that while charity is vital, one's financial stability and obligations must also be considered.

This method allows individuals to support those in need effectively and responsibly, recognizing the diverse circumstances that might affect not only the giver's ability to contribute but also the varying needs of recipients. By focusing on giving a fifth of one's wealth, it maintains a structured and fair approach to charity, emphasizing consistency without overwhelming the donor.

In contrast, the other options do not align with this principle. Giving half of one's wealth may not be sustainable for most, while donating only during holidays doesn’t address ongoing needs throughout the year. Sporadic giving, although beneficial, lacks the consistent commitment that structured contributions provide, which is highlighted in the teachings of Beit Yosef.