Inertia Calculator

See what doing nothing is really costing you

Not financial advice. Stackly provides general information, not financial, tax, or insurance advice. Figures are estimates and may not reflect your situation. Confirm anything important with a licensed professional before acting.

Choose Your Inertia

Inertia is the invisible tax you pay by doing nothing. Pick an area below to see what staying still is really costing you — and what one small change could do.

Insurance Inertia

The loyalty tax you pay by not comparing

Est. 800+/year

Mortgage Inertia

Extra interest you pay by not refinancing

Est. 2,400+/year

Health Inertia

The cost of not moving your body

Track your health journey

💡 How it works

Pick an area where you've been putting things off. Answer a few quick questions (no uploads needed). Then see two timelines: what happens if you do nothing vs. what happens with one small change.

📊 Real constraints

Takes your actual situation into account — time, motivation, admin capacity

✅ Next actions

Get 3 concrete steps: 5 min, this weekend, and optimize later

📈 Track progress

See your inertia cost shrink as you take action