Levelling

Uses

 * Every time you level up you will be given one skill point. Every tenth level gives 1 additional skill point. At level 100, a total of 110 skill points are available for use.
 * At level 100, the player can choose to go infamous. Doing so resets their level, experience, any allocated or unallocated skill points, weapons and all of their money. In turn, they gain an infamy point to spend in the infamy tree to unlock money and experience boosts, as well as permanent skill points that don't reset with infamy. After infamy level V, the player's money loss is only 20 million.
 * Certain weapons have a level requirement before they can be purchased.
 * The player hosting a heist can set a level requirement of anywhere between 10 and 100. Any joining players must meet this requirement, although players invited by the host and infamous players ignore said level requirement.

Experience requirement
The experience requirement per level uses the following formula: $$1025 \cdot level + level^{1.3}$$

Other notes

 * The in-game level progression bar is not an accurate representation of the amount of experience required to level up, nor total experience.