CALCMONEY // STUDENT LOAN // SD
Estimate your monthly student loan payment, income-based repayment amount, and total interest using South Dakota income and cost-of-living data.
Open Full Student Loan Calculator$63,900
92
$344/mo
None
| National Avg Undergraduate Debt | $37,650 |
| Standard 10-Year Monthly Payment | $428/mo |
| Total Interest Paid (10 years) | $13,743 |
| Extended 20-Year Monthly Payment | $282/mo |
| Total Interest Paid (20 years) | $29,933 |
| Est. IBR Payment (based on median income) | $344/mo |
$791/mo
10-year standard repayment
8.0%
Annual payments / median household income
South Dakota Student Loan Quick Reference 2026
| Metric | Value | Notes |
|---|---|---|
| Median Household Income | $63,900 | State median |
| National Avg Loan Balance | $37,650 | Undergraduate |
| Standard 10-Yr Payment | $428/mo | 6.54% federal rate |
| Total Interest (10-yr) | $13,743 | On avg balance |
| Est. IBR Payment | $344/mo | 10% of discretionary income |
| Payment as % of Income | 8.0% | Annual payments / median income |
IBR calculated using 10% of discretionary income above 150% of federal poverty line.
The median household income in South Dakota is $63,900. On the national average student loan balance of $37,650, a standard 10-year repayment plan at 6.54% costs $428/month — representing 8.0% of gross median income. Financial planners typically recommend keeping student loan payments below 10% of gross income.
South Dakota's cost of living is near the national average (index: 92). Standard repayment plans are manageable for most borrowers earning at or above the state median income.
South Dakota has no state income tax, so federal student loan interest deductions (up to $2,500/year) represent your full tax benefit. No additional state-level deduction applies.
| Loan Balance | Monthly Payment | Total Interest | % of SD Income |
|---|---|---|---|
| $15,000 | $171/mo | $5,475 | 3.2% |
| $27,000 | $307/mo | $9,856 | 5.8% |
| $37,650 | $428/mo | $13,743 | 8.0% |
| $50,000 | $569/mo | $18,251 | 10.7% |
| $75,000 | $853/mo | $27,376 | 16.0% |
| $100,000 | $1,138/mo | $36,502 | 21.4% |
On the national average student loan balance of $37,650, a standard 10-year federal repayment plan at 6.54% produces a monthly payment of approximately $428. With South Dakota's median household income of $63,900, that payment represents about 8.0% of gross annual income.
IBR caps your federal student loan payment at 10% of discretionary income. Discretionary income is calculated as your adjusted gross income minus 150% of the federal poverty line (approximately $22,590 for a single person). Based on South Dakota's median household income of $63,900, the estimated IBR payment would be approximately $344/month. Any remaining balance after 20–25 years is forgiven, though forgiven amounts may be taxable.
Federally, you can deduct up to $2,500 of student loan interest per year if your modified adjusted gross income is below $85,000 ($170,000 married filing jointly). The deduction phases out above those limits. South Dakota has no state income tax, so the federal deduction is the only student loan interest deduction that applies.
South Dakota has a cost of living index of 92 (national average = 100). At 92, South Dakota's cost of living is near the national average, providing a reasonable baseline for standard repayment on a median income.