Contribution increases should be tied to specific triggers rather than arbitrary decisions. Common sensible triggers include receiving income increases and directing a portion toward investments before lifestyle inflation consumes it, reaching predetermined account milestones that demonstrate the current strategy is working, and periodic reviews where your financial situation has genuinely improved. The behavioral trick that works for most people is automating contribution increases so they happen without requiring active decisions, because most people's natural inclination is to spend available money rather than invest it.