Cash Flow Roi

What expenses should be included in ROI calculations?

South Dakota rental guidance and tenant-landlord operational information.
Published April 28, 2026 State-specific rental guidance Update This Question
Reviewed by Tenants & Landlords Editorial Team

This rental guidance was reviewed by the Tenants & Landlords Intelligence Team, specializing in lease agreements, notices, rent disputes, deposits, evictions, and tenant-landlord operational procedures.

Asked 36 days ago · South Dakota

Understanding Expenses in ROI Calculations for Rental Investors in South Dakota

When evaluating rental property investments in South Dakota, calculating your Return on Investment (ROI) accurately is essential for making informed decisions. A key part of this calculation involves understanding which expenses should be included. Properly accounting for all relevant costs ensures your ROI reflects the true profitability of your property.

Why Accurate Expense Inclusion Matters in South Dakota

South Dakota offers attractive rental markets with relatively low property taxes and favorable landlord laws. However, investors must consider the unique cost structure associated with maintaining and managing properties in this state. Neglecting any expense categories can lead to an inflated ROI estimate, potentially jeopardizing your investment’s financial performance.

Core Expenses to Include in ROI Calculations

1. Property Taxes

South Dakota is known for its relatively low property taxes compared to national averages, but they can still be a significant expense. Your annual property tax bill directly impacts your cash flow and should be allocated on a monthly basis when calculating ROI.
  • Check with the local county assessor’s office for your exact rate.
  • Remember to factor in any special assessments or tax incentives related to your rental property.

2. Mortgage Payments

If you financed your South Dakota property, include the principal and interest portions of your mortgage payment. This is typically the largest recurring cash outflow impacting your ROI.
  • Only include mortgage payments if you’re using leverage, as this affects both cash flow and overall ROI.
  • Use amortization schedules reflecting your specific loan terms to separate principal and interest.

3. Property Insurance

Insurance premiums for rental properties protect your investment from risks such as fire, liability claims, and natural disasters. South Dakota’s climate and risk profile may affect premium rates.
  • Obtain quotes from insurance providers familiar with South Dakota rentals.
  • Include the full premium amount allocated monthly in your expense calculations.

4. Property Management Fees

If you hire a professional property management company, include the management fees as an operating expense.
  • Typical fees range from 8% to 12% of monthly rental income.
  • Management costs reduce your net cash flow and therefore must be factored into ROI.

5. Maintenance and Repairs

Regular upkeep is crucial for preserving your property’s value and tenant satisfaction. These costs can vary but must be estimated realistically.
  • Budget for routine expenses such as lawn care, HVAC servicing, pest control, and small repairs.
  • Also reserve funds for unexpected emergency repairs common in South Dakota’s seasonal weather conditions.

6. Utilities (When Landlord-Paid)

If you, as the landlord, cover any utilities—such as water, sewer, trash, or gas—account for these in your ROI calculation.
  • Clarify which utilities are tenant-paid and which are your responsibility.
  • Include monthly average costs to maintain accuracy.

7. Vacancy Allowance

Vacancies cause lost rental income but do not prevent you from incurring fixed expenses. A vacancy reserve accounts for potential downtime between tenants.
  • Typical vacancy rates depend on your South Dakota rental market area; a common estimate is 5-10%.
  • Deduct estimated vacancy loss from your gross income to reflect realistic cash flow.

8. Legal and Accounting Fees

Expenses related to landlord-tenant disputes, contract preparations, or tax filing services should be included.
  • South Dakota’s landlord-tenant laws may necessitate legal assistance occasionally.
  • Incorporate these costs as part of your operating expenses on a monthly or annualized basis.

9. Capital Expenditures (CapEx)

Large, infrequent expenses like roof replacement, HVAC system upgrades, or major appliance purchases must be factored in, even though they are not regular operating expenses.
  • Estimate annual CapEx reserves by dividing the expected cost by the useful life of the asset.
  • Setting aside 5-10% of rental income annually for CapEx is a common rule of thumb.

Example: Monthly Expense Breakdown for a South Dakota Rental Property



Expense CategoryEstimated Monthly Cost
Property Taxes$150
Mortgage Payment$1,200
Insurance$80
Property Management$120 (10% of rent)
Maintenance & Repairs$100
Utilities (Landlord-paid)$50
Vacancy Allowance$60 (5% of rent)
Legal & Accounting$30
Capital Expenditures$70
Total Expenses$1,860

These costs must then be subtracted from your total rental income to determine the net operating income (NOI), which is the basis for calculating ROI.

Conclusion

For rental property investors in South Dakota, accurately including all relevant expenses in your ROI calculations is critical for assessing your property's performance and making informed investment decisions. Incorporate property taxes, mortgage payments, insurance, management fees, maintenance, utilities, vacancy allowances, legal costs, and capital expenditures to achieve a comprehensive view of your cash flow and return.

A thorough understanding of these expense components supports realistic expectations in South Dakota’s rental market and helps safeguard your investment returns over the long term.

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