Net income vs lifestyle creep

It is when spending quietly rises to match or exceed a growing income, so a raise or bonus never actually improves your financial position. It happens gradually, a slightly nicer apartment here, a few more subscriptions there, until the extra income is fully absorbed.

The clearest sign is that your spending seems to rise every time your income does, leaving your savings rate roughly flat or shrinking despite earning more. Logging both over time, which is exactly what this tool does, is the most direct way to see it happening.

Not entirely, spending more as you earn more is natural and some of it is a reasonable improvement in quality of life. The problem is when it happens without a decision behind it, silently consuming a raise that could have gone toward savings, debt, or real goals.

A common approach is deciding in advance what percentage of any raise or bonus goes to savings before the rest is available to spend. Automating that split the moment new income arrives removes the decision entirely, which is usually more effective than willpower alone.

Monthly is ideal, though even logging after every raise, bonus, or major income change is enough to see the pattern clearly over a year or two. The trend matters far more than any single month, so consistency is what makes this tool useful.