The cheapest city by an index is not necessarily the place where your own budget improves most. The useful question is how much money remains after your expected income and expenses change. Begin with a city comparison, then replace the broad estimates with your household's numbers.
Read the index correctly
MoveNumbers uses saved overall cost indexes, with adjustments and regional fallbacks for some cities. An index ratio of 0.80 means the destination index is 20% below the origin index. It does not mean every item you buy will cost 20% less. Your debt payment, a nationwide subscription or an unchanged job benefit may not vary at all.
Our equivalent-salary model applies that ratio to a fixed 60% share of income. At a $75,000 origin salary and a 0.80 ratio, the model returns $66,000: $75,000 × (0.40 + 0.60 × 0.80). The displayed monthly difference is $750. That is a model output, not a measurement of money you will save.
Calculate disposable income in each place
Use monthly take-home pay minus recurring household expenses. In an illustrative scenario, your current take-home is $5,200 and expenses are $4,600, leaving $600. The destination offers $5,000 take-home and $4,050 expenses, leaving $950. The improvement is $350 monthly even though income falls.
If a second car costs another $450 monthly after the move, that same scenario leaves $100 less than your current budget. This is why a single cost-of-living number cannot settle the decision.
Give the move a payback test
Divide nonrefundable one-time moving costs by the positive monthly improvement. A $4,200 move with $350 monthly improvement has a simple 12-month payback. If the improvement is zero or negative, there is no positive financial payback under those assumptions. This calculation ignores financing, inflation and investment returns; label it accordingly.
Keep a short evidence list
- One current comparable housing quote for each location, including required fees.
- Employer-confirmed compensation and an estimate of payroll deductions.
- The transport, insurance and household costs that actually change.
- A separate moving-cost total and the dates deposits must be paid.
Use Explore to find candidates and compare two cities. The methodology documents the exact model and where its inputs are estimates. A location stays on your shortlist when the personal budget works, not merely because it has a lower ranking number.