What factor affects allowable deductible contributions to an IRA?

The amount you can contribute to an Individual Retirement Account (IRA) is influenced by your total income, specifically your modified adjusted gross income (MAGI). For traditional IRAs, there are income limits that determine whether you can deduct your contributions from your taxable income. If your income exceeds certain thresholds, the amount you can deduct may be gradually decreased or completely eliminated, depending on your specific circumstances, such as whether you or your spouse is covered by a workplace retirement plan.

In terms of other factors, while age does play a role in contribution limits, particularly when considering catch-up contributions for individuals aged 50 and older, it does not directly affect the deductibility of contributions like income does. The presence of dependents and the number of accounts held do not impact the deductibility of IRA contributions. Therefore, your total income stands as the primary factor influencing how much of your IRA contributions can be deducted from your taxable income.