The mandatory LPP covers the portion of annual salary between CHF 26,640 and CHF 90,720 (2026 amounts), with contribution rates and a conversion rate (6.8%) set by law. The non-mandatory portion of the LPP covers any contributions the employer voluntarily makes above this legal minimum, with contribution rates of up to 35% of the insured salary and often a free choice of investment strategy. It is this portion that offers the greatest potential for tax optimization.