A bunching strategy is when you time your donations to shift them into a single tax year.

Because of the new higher standard deductions and limitation on state tax deductions, there will be more people without enough deductions to itemize. For example, if your filing status is married filing joint and you have $18,000 of itemized deductions and $4,000 of charitable donations, the total itemized deductions will be $22,000, which is less than the standard deduction of $24,000. If you bunch your donations and donate $8,000 in one year instead of $4,000 each year, your itemized deductions will total $26,000 and in the other year you can make use of the $24,000 standard deduction.