From the point of view of taxation, pillar 3a is primarily intended to fund your retirement, which makes it an interesting savings vehicle. You can deduct your annual premiums from your taxable income. This is permitted up to the maximum amount fixed by the federal government. The payout is then taxed once, at a separate tax rate.
As no capital is accumulated under earning disability insurance, the premiums for it are more attractive. If you haven’t yet utilized the maximum amount permissible under pillar 3a, you can take out earning disability insurance under that pillar and benefit from the tax advantages offered.
If you have already used up pillar 3a for pension insurance, you can take out your earning disability insurance under pillar 3b.