How much do I need to retire in Montana?

Using the 4% rule against typical Montana retiree costs of about $34,802 a year — after an assumed Social Security benefit — you'd need roughly $320,050 invested. Enter your own numbers above to personalize it.

A common retirement guideline: you can withdraw about 4% of your savings in the first year of retirement, then adjust for inflation, with a good chance the money lasts 30 years. It implies a nest egg of about 25× your annual spending.

How Much to Retire in Montana?

Estimate the nest egg you need to retire in Montana using the 4% rule against typical local retiree costs, then check it against what you're on track to save.

To retire in Montana you need

$320,050

invested by age 65 (4% rule, today's dollars)

Projected at retirement	$889,194
Nest egg needed	$320,050
Surplus	$569,144

Assumes a 5% real return and the 4% safe-withdrawal rule. Spending prefilled from typical Montana retiree costs. Not financial advice.

How Montana taxes retirement income

Mixed for retirees

Social SecurityPartially taxed

Pension incomePartially taxed

401(k) & IRA withdrawalsPartially taxed

SS taxed on a near-federal formula (over $25k single/$32k joint); a modest ~$5,660 retirement-income subtraction, remainder taxed.

Source: BEA Regional Price Parities by category (goods / rents / other services); BLS CEX baseline (rents 84.648, goods 96.006, other services 98.715; US=100) · as of 2024 · methodology

Source: Kiplinger & AARP state retirement-tax guides, state Departments of Revenue · as of 2026 · methodology

How much you need to retire in Montana

The 4% rule is a widely used starting point: multiply the annual spending your savings must cover by 25 to get a target nest egg. In Montana, typical retiree costs run about $34,802 a year; after an expected Social Security benefit, the savings you need to generate the rest comes to roughly $320,050.

The calculator then projects your current savings and monthly contributions forward at a 5% real return to show whether you're on track or facing a gap. How Montana taxes retirement income also matters: Montana is mixed for retirees: Social Security is partially taxed, pension income is partially taxed, and 401(k)/IRA withdrawals are partially taxed. SS taxed on a near-federal formula (over $25k single/$32k joint); a modest ~$5,660 retirement-income subtraction, remainder taxed.

A quick gut check for Montana: covering about $34,802 a year, minus an expected Social Security benefit, implies roughly $320,050 invested under the 4% rule. Retiring earlier, spending more, or assuming a lower return all raise that target, while a paid-off home or a larger Social Security benefit lowers it — the calculator lets you watch each lever move the number.

The biggest swing factor is when you start. Because returns compound, the same monthly contribution invested in your thirties can end up worth far more at retirement than one started in your forties, even in the same Montana scenario. If the projection shows a gap, raising the monthly contribution a little now is usually more powerful than trying to make it up later with larger amounts closer to retirement.

Frequently asked questions

How much do I need to retire in Montana?: Using the 4% rule against typical Montana retiree costs of about $34,802 a year — after an assumed Social Security benefit — you'd need roughly $320,050 invested. Enter your own numbers above to personalize it.
What is the 4% rule?: A common retirement guideline: you can withdraw about 4% of your savings in the first year of retirement, then adjust for inflation, with a good chance the money lasts 30 years. It implies a nest egg of about 25× your annual spending.
Does Montana tax retirement income?: Montana is mixed for retirees: Social Security is partially taxed, pension income is partially taxed, and 401(k)/IRA withdrawals are partially taxed. SS taxed on a near-federal formula (over $25k single/$32k joint); a modest ~$5,660 retirement-income subtraction, remainder taxed.