The Big Items
The "Big Three" (Housing, Transport, Taxes) where you spend 70% of your income don't care about the aggregate COL index. They care about supply and demand, and in Meridian, supply is struggling to keep up with the influx of people fleeing more expensive states.
Housing: The Trap of Choice
The housing market in Meridian is a tale of two distinct traps. For renters, the market has stabilized but remains high. A standard 2-bedroom apartment will run you roughly $1,655 per month. While this is lower than Boise proper, it represents a significant chunk of that $55,168 baseline income (roughly 36% of gross). This is the "rent trap"—you are paying enough to prevent aggressive saving, but not enough to force a move to ownership. For buyers, the waters are even murkier. Median home prices hover in the low $400s, but the killer isn't the sticker price; it’s the interest rate environment. A buyer putting 10% down on a $410,000 home at current rates faces a monthly mortgage payment exceeding $2,800. That doesn't include the "invisible" monthly cost of property taxes. If you aren't putting down 20%, you are also paying Private Mortgage Insurance (PMI), which is literally burning money for the privilege of borrowing. The market heat has cooled slightly, but the barrier to entry remains massive for anyone without equity from a previous home.
Taxes: The Idaho Bite
Idaho loves to pitch itself as a low-tax haven. Do the math, and you realize the "low" part applies to the wealthy, not the middle class. The income tax is progressive, currently topping out at 7.4% for earners over $12,000. That is a flat bite off the top of your gains. However, the real gut punch is property tax. While the rate seems low, the valuation of homes has skyrocketed. You are taxed on the value of the asset, not what you can afford. Expect an annual property tax bill in the $3,000 - $4,500 range for a median home. That is roughly $300 a month baked into your mortgage payment that you never see, never touch, and never get back. It is the cost of existing in the state, period.
Groceries & Gas: The Local Variance
Don't expect relief at the pump or the checkout line. Meridian sits within the Boise metro area, which historically sees gas prices 15-20% higher than the national average due to logistics and specific state fuel taxes. You are paying a premium for the geography. Groceries follow suit; while a gallon of milk might be standard, the "Idaho premium" on produce and meats adds up. A single person budgeting $400 a month for food is being realistic, not frugal. Any less, and you are relying on processed, low-nutrient filler foods. The "local variance" here is that you are paying coastal prices for goods without coastal wages, unless you are in a very specific tech or medical sector.