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Retirement Savings Calculator for Rapid City, SD
Local data pre-filled
The median household income in Rapid City is $71,985. With a cost of living index of 93, your retirement needs will be lower than average. Planners generally recommend saving 10–15% of income; at Rapid City's median income that's $8,638–$10,798 per year.
✓ Calculator below is pre-filled with Rapid City local data
Data as of · Sources: Zillow, Census ACS, Tax Foundation, Freddie Mac
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South Dakota Financial Snapshot (2026) — Retirement Savings Calculator
Social Security + 401(k) state treatment + estate exemption shape the retirement savings calculator in South Dakota. Every row cites a primary public dataset. Numbers reflect the most recent vintage available; refresh cadence is documented in the methodology.
How the Retirement Savings Calculator Math Works Under South Dakota Law
Your retirement projection in South Dakotahas two tax-aware legs: the accumulation side (contributions reduce today's AGI) and the withdrawal side (distributions are taxed when you pull them out). South Dakota does NOT tax Social Security benefits, and 401(k) withdrawals are NOT taxed at the state level[1].
This changes the math. A flat-tax state that spares Social Security means the 4% safe-withdrawal rule stretches further in real terms than the raw headline number suggests — the right portfolio target is FIRE_number = annual_expenses × 25, where annual_expenses already nets out state taxes. No state-level estate tax simplifies high-net-worth planning — only federal estate tax above the $13.99M exemption applies.
Calc-specific note: Rule of 25: FIRE number = annual expenses × 25. Expenses must be net of state taxes on withdrawals.
Worked example — South Dakota
A South Dakota household targeting $80,000/year in retirement spending needs a portfolio ≈ $2,000,000 (25× rule, 4% SWR). No state tax on withdrawals keeps the target at $2,000,000.
Local context: Rapid City, SD
Housing economics in Rapid City, SD. The median home value runs 3.3% above the U.S. baseline for Rapid City, SD is $369,930 per Zillow's home-value index. Median rent runs $1,352 a month per Zillow ZORI, cheaper than the national $1,850 baseline. Effective property tax sits at 1.20% of assessed value, meaningfully higher than the 0.99% national average tracked by the Tax Foundation. Lenders in Rapid City, SD have quoted 6.30% on the 30-year fixed product over the trailing four-week window per Freddie Mac PMMS — the prevailing posted rate before any borrower-specific lock-ins.
Income and tax climate. South Dakota's top marginal state income tax bracket lands at 0.00% — one of nine states that levies no broad-based income tax, shifting the revenue burden onto sales, property, and severance levies. BEA's Regional Price Parity scores Rapid City, SD at 93.0 (national = 100), meaning a dollar in Rapid City, SD buys 108¢ — more goods and services than the same dollar nationally.
How Rapid City, SD shapes retirement math. State income tax treatment of retirement distributions varies more than most savers realize — some states exempt Social Security entirely, others exempt pensions but tax 401(k)/IRA distributions at ordinary rates, others tax everything. Rapid City, SD's top marginal bracket and its specific exemption rules feed the retirement-savings, Social Security optimization, and required-minimum-distribution calculators on this page. Cost-of-living also matters: the same nominal nest egg buys different lifestyles in different states, and BEA's Regional Price Parity index makes that quantifiable.
Local context as of 2026-05-31. Live data sources are listed in the Sources section below; each metric carries its own retrieval date.
Rapid City versus the U.S. baseline
How does Rapid City, SD stack up against the national average on the metrics that drive the calculators on this page? The table below pairs the Rapid City, SD-specific reading against the U.S. baseline so you can see at a glance whether your local scenario runs above or below typical. Three to five percentage points of difference on most of these inputs translates into meaningful changes in calculator output — for example, a 50-basis-point difference in mortgage rate moves the monthly payment on a $400,000 30-year loan by roughly $130.
| Metric | Rapid City, SD | U.S. baseline | Difference |
|---|---|---|---|
| Median home value[zillow] | $369,930 | $358,000 | 3.3% |
| Median monthly rent[zillow] | $1,352 | $1,850 | -26.9% |
| Property tax (effective)[tax-foundation] | 1.20% | 0.99% | 21.2% |
| State top marginal income tax[tax-foundation] | None | ~4.08% (volume-weighted) | −4.08 pp |
| State cost-of-living index[bea-rpp] | 93.0 | 100.0 | -7.0 pts |
How to use the Retirement Savings Calculator
Walk through using the Retirement Savings Calculator with Rapid City, SD-specific defaults pre-loaded from primary sources.
- Enter your Rapid City numbersFill in the retirement savings inputs. Defaults reflect Rapid City, SD 2026: median home $369,930, median rent $1,352/mo, 1.20% effective property tax.
- Apply the local 2026 inputsThe median home value in Rapid City is $369,930 (Zillow ZHVI), with median monthly rent running $1,352/mo.
- Compare against Rapid City contextMonthly PITI on the $369,930 median home in Rapid City is ~$2,694/mo — vs a $1,352/mo median rent.
How South Dakota Compares to Neighboring States
Moving one state over changes the retirement savings numbers. Compare median home value (Zillow ZHVI), top marginal income tax rate, effective property tax rate, and the BEA all-items Regional Price Parity across South Dakota and its border states.
| State | Median home | Top inc tax | Prop tax rate | RPP (US=100) |
|---|---|---|---|---|
| South Dakota (this page) | $275,000 | None | 1.24% | 88.1 |
| compare to Iowa | $215,000 | 3.80% | 1.50% | 88.8 |
| check Minnesota | $335,000 | 9.85% | 1.12% | 98.3 |
| see Montana | $460,000 | 5.90% | 0.83% | 91.0 |
| Nebraska side-by-side | $265,000 | 5.20% | 1.73% | 90.3 |
Sources: Zillow ZHVI[1], state Departments of Revenue / Tax Foundation[2], Tax Foundation property taxes[3], BEA Regional Price Parities[4].
What Changes Your Result in South Dakota
- No state income tax:South Dakota is on the short list of states with no personal income tax. That does NOT mean no state taxes — sales, property, and excise taxes make up the gap. Check the neighbor comparison for the full carrying-cost picture.
- Social Security is exempt:South Dakota does not tax Social Security benefits, a meaningful tailwind vs. peer states. Treat your benefit as pre-tax-federal, post-tax-state[6].
How Rapid City Compares to the National Average
Understanding how Rapid City stacks up helps you calibrate your financial planning.
| Metric | Rapid City, SD | US Average | Difference |
|---|---|---|---|
| Median Home Price | $369,930 | $420,800 | -12.1% |
| Median Monthly Rent | $1,352 | $1,713 | -21.1% |
| Median Household Income | $71,985 | $74,580 | -3.5% |
| Property Tax Rate | 1.20% | 1.10% | +9.1% |
| Cost of Living Index | 93 | 100 | -7.0% |
Sources: U.S. Census Bureau, BLS, Zillow, NAR (2024–2025). Green = favorable for residents; red = less favorable.
Rapid City Financial Snapshot
- Population (Metro)
- 150,000
- Unemployment
- 2.8%
- Avg Commute
- 17 min
- Median Age
- 37.2
- Price-to-Rent Ratio
- 22.8x
- Annual Property Tax
- $4,439
More Financial Calculators for Rapid City, SD
Retirement Savings Calculator in Other South Dakota Cities
Frequently Asked Questions — Rapid City
- Can median-income households afford the median home in Rapid City?
- With a ~$2,694 monthly PITI and $71,985 median income, housing would consume ~44.9% of gross annual income. Qualifying under the 28% DTI rule requires ~$115,457 in annual income. Educational reference only.
- Is it better to rent or buy in Rapid City?
- Rapid City's price-to-rent ratio (22.8x) tilts toward renting — above 20x, buying is generally expensive relative to renting.
- What is the annual property tax bill on the median home in Rapid City?
- Approximately $4,439/yr at the 1.20% effective rate on the $369,930 median home. The national average effective rate is 1.07%.
- What share of median income goes to rent in Rapid City?
- The $1,352/mo median rent represents 22.5% of the $71,985 median household income. The recommended housing cost threshold is 30%; Rapid City falls within that guideline. Educational reference only.
- How much does commuting cost in Rapid City?
- Average commute time in Rapid City is 17 minutes per ACS. Estimated annual commute cost runs about $2,961 — a cost frequently overlooked when calculating true household affordability. Educational reference only.
- How does the cost of living in Rapid City compare to the national average?
- Rapid City's BEA RPP index is 93, 7% below the national baseline of 100. For a household earning the national median income of $77,540, this translates to ~$5,428/yr in purchasing power difference. Educational reference only.
- What is the median home price in Rapid City, SD?
- The median home price in Rapid City is $369,930 as of 2025–2026.
- What is the average rent in Rapid City?
- The median monthly rent in Rapid City, SD is $1,352.
- Where does Rapid City data on this page come from?
- Rapid City numbers are pulled from Zillow ZHVI/ZORI (home values, rent), the U.S. Census Bureau ACS (income, demographics), and Tax Foundation (property tax). Each value is timestamped on the page.
- How often is the Rapid City retirement savings updated?
- Source feeds (Zillow, Freddie Mac PMMS, Census ACS) are refreshed on their native cadence — hourly for mortgage rates, monthly for ZHVI/ZORI, annually for ACS. Page caches revalidate every 24 hours via Next.js ISR.
- Does the retirement savings replace professional advice?
- No. This calculator gives educational estimates using public Rapid City data and standard formulas. It is not personalized tax, legal, or investment advice. Consult a licensed professional for decisions with material consequences.
How we compute this — methodology
The Rapid City page uses local median home price ($369,930), median rent ($1,352/mo), and property tax rate (1.20%) alongside the calculator's client-side formula. Calculations run in your browser — no inputs are sent to a server.
Refresh cadence:home price (Zillow ZHVI) and rent (Zillow ZORI) are reviewed monthly when the source publishes. Property tax and cost-of-living figures refresh annually. The page's dateModified reflects the most recent retrievedAt across every sourced value rendered above.
Known limits: ZIP-level variance within Rapid City can be substantial — the figures shown are city-wide medians. For a precise property tax quote, consult your county assessor.
Sources
- Zillow Research — ZHVI (Zillow Home Value Index) + ZORI (Zillow Observed Rent Index), city-level. zillow.com/research/data. Retrieved 2026-04-19.
- U.S. Census Bureau — American Community Survey (ACS) 5-year estimates for median household income and population. census.gov/programs-surveys/acs.
- CalcFi state financial context — tips + first-time homebuyer programs compiled from each state's Housing Finance Authority (HFA) public pages. See
src/data/state-financial-context.ts. - Tax Foundation — state property tax effective rates and state/local sales tax rates. taxfoundation.org.
- Freddie Mac Primary Mortgage Market Survey (PMMS) — weekly national mortgage rate averages used by mortgage-related calculators. freddiemac.com/pmms.
- Social Security Administration — OASDI / Medicare benefit + contribution rules — www.ssa.gov. Retrieved 2026-04-19.
- Internal Revenue Service — federal individual income tax brackets and standard deductions — www.irs.gov/forms-pubs/about-publication-17. Retrieved 2026-04-19.
- State Departments of Revenue — official bracket + deduction publications (one primary URL per state; linked in the brackets table below) — taxfoundation.org/data/all/state/state-income-tax-rates. Retrieved 2026-04-19.
- FDIC — National Deposit Rates (savings, checking, CD) — www.fdic.gov/resources/bankers/national-rates. Retrieved 2026-04-19.
- Freddie Mac Primary Mortgage Market Survey (PMMS) — weekly national mortgage rates — www.freddiemac.com/pmms. Retrieved 2026-04-19.
- NAIC Dwelling Fire, Homeowners Owners, and Homeowners Tenants Insurance Report — content.naic.org/article/homeowners-insurance-report. Retrieved 2026-04-19.
- Bureau of Economic Analysis — Regional Price Parities by State — www.bea.gov/data/prices-inflation/regional-price-parities-state-and-metro-area. Retrieved 2026-04-19.
- U.S. Department of Labor — State Minimum Wage Laws — www.dol.gov/agencies/whd/minimum-wage/state. Retrieved 2026-04-19.
- FRED (Federal Reserve Economic Data) — real median household income, unemployment, HPI, LFPR per state — fred.stlouisfed.org. Retrieved 2026-04-19.
- HUD Fair Market Rents — 50th-percentile 2-bedroom FY — www.huduser.gov/portal/datasets/fmr.html. Retrieved 2026-04-19.
- BLS Occupational Employment and Wage Statistics (OEWS) — state-level occupational wages — www.bls.gov/oes. Retrieved 2026-04-19.
Spot an error? Email hello@calcfi.app with the URL and the correct figure.
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National reference: Retirement Savings Calculator