1. South Dakota-specific invoice requirements
- Sales tax line: 4.20% state rate. Services billed to SD customers must include sales tax. State 4.2%; applies broadly to services. Combined commonly 6-7%.
- Late-fee cap: South Dakota statute S.D. Codified Laws §54-3-4 caps interest on unpaid invoices at 1.5% per month. Spell out the rate in writing on every invoice and in your contract — courts won't enforce undisclosed fees.
- Right-to-cancel notice: Customers in South Dakota get 72-hour cancellation rights on certain home-services contracts. Disclose this in your terms.
2. Private Security Company line items + standard terms
Every private security company invoice in South Dakota should itemize work clearly. Standard private security companys use Net 30 terms with no deposit required.
- Unarmed officer — per hour — billed by hour (~$35 default).
- Armed officer — per hour — billed by hour (~$65 default).
- Vehicle patrol — billed by flat.
- Holiday surcharge — billed by pct.
3. Private Security Company licensing in South Dakota
State security agency license required. Each officer must hold state guard card; armed officers need separate firearms permit.
4. Send and follow up
Send the invoice the same day work completes. Use software that records open events and offers a one-click online payment so you don't need to chase a check by mail. South Dakota customers expect digital payment options today — accepting card and ACH typically reduces days-to-paid by 30–50%.
Average invoice
$1,850
State
SD
Net terms
30 days
Deposit
0%
South Dakota metro guides
Metro-specific guides include the combined sales-tax rate and local pricing benchmarks.