Retire Modestly in Rapid City, SD (2026)
Small apartment, cook at home, public transit, minimal travel. In Rapid City (COL 88), this costs $2,347/month — a $4K less than the US average.
Monthly budget breakdown
Estimated monthly expenses for a modest retirement in Rapid City (COL-adjusted from national baseline).
| Category | Monthly | Annual | % of budget |
|---|---|---|---|
| Housing | $775 | $9,300 | 33% |
| Food | $352 | $4,224 | 15% |
| Healthcare | $329 | $3,948 | 14% |
| Transport | $282 | $3,384 | 12% |
| Leisure | $329 | $3,948 | 14% |
| Misc | $282 | $3,384 | 12% |
| Total | $2,347 | $28,160 | 100% |
How long to save $704K?
Time to reach your nest egg target investing at 7% annual return (S&P 500 historical avg).
| Monthly savings | Years to retire | Retirement age (start 30) |
|---|---|---|
| $1,000/mo | 24 yrs | Age 54 |
| $2,000/mo | 16 yrs | Age 46 |
| $3,000/mo | 13 yrs | Age 43 |
| $5,000/mo | 9 yrs | Age 39 |
| $8,000/mo | 6 yrs | Age 36 |
Rapid City vs US average — Modest retirement
Other retirement tiers in Rapid City
Frequently asked questions
How much does a modest retirement cost in Rapid City?
A modest retirement in Rapid City costs approximately $28,160/year or $2,347/month — based on a 88 cost-of-living index (US avg = 100). Using the 4% safe withdrawal rule, you need a nest egg of about $704K.
How long will it take to save $704K for retirement in Rapid City?
Saving $2,000/month at a 7% average annual return would take roughly 16 years to accumulate $704K. At $3,000/month, it would take about 13 years. These estimates assume consistent investing in a diversified portfolio.
What is the biggest expense in a modest retirement in Rapid City?
Housing is the largest expense at roughly 33% of the budget ($775/month). Healthcare ($329/month) is the second-largest category. SD has no state income tax, which reduces your overall tax burden in retirement.
4% safe withdrawal rule · 7% annualized return assumption · COL-adjusted from BLS data · Q1 2026 estimates