Books Built Around South Dakota's Sales Tax
In a state that funds itself mainly through sales and excise taxes, the books do more than produce a profit figure. They have to show taxable and exempt revenue, tax collected for each city, contractor's excise tax by project and use tax on purchases, every period. BOMCAS keeps monthly books for South Dakota businesses with those numbers in mind, so the state returns and the federal return come straight from the ledger.
A Chart of Accounts That Matches Your Returns
We set up or clean up the chart of accounts so that it mirrors the returns you file:
- Separate revenue accounts for taxable sales, exempt sales, sales for resale and sales delivered outside South Dakota.
- Liability accounts for state sales tax, municipal sales tax, municipal gross receipts tax and tourism tax, with the city recorded on each sale.
- From 2027, a place for any county option tax adopted where you sell.
- Expense coding that flags purchases on which use tax may be owed, such as out-of-state software and services.
When the accounts follow the return lines, preparing the return takes minutes and the figures can be traced in an audit.
The Monthly Close
Each month we:
- Reconcile every bank, credit card and loan account to its statement.
- Match sales by city and tax type to the point-of-sale or invoicing reports.
- Reconcile the sales tax liability accounts to the return filed, so the balance left equals tax collected but not yet paid.
- Review purchases for use tax and for items taken out of inventory for business use.
- Produce a profit and loss statement, a balance sheet and a short note on anything unusual.
Job Costing for Contractors
Prime contractors owe contractor's excise tax on gross receipts, and the department expects records by contract. We track each job separately: contract amount, billings, receipts, materials and the sales or use tax paid on them, owner-furnished materials, and the prime contractor's exemption certificates issued to subcontractors. Speculative builds and buildings built for lease are tracked until they are sold, occupied or rented, since that can trigger the tax. The same records also support percentage-of-completion reporting on the federal return.
Seasonal Businesses in the Black Hills
Hotels, campgrounds, attractions, outfitters and restaurants around Rapid City, Keystone, Custer, Deadwood and Sturgis earn much of their year in a few summer months. Their books need to handle advance deposits, gift cards, temporary staff and a mix of sales tax, municipal gross receipts tax and the 1.5 percent tourism tax. We set aside tax collected so it is not spent, track deposits as liabilities until the stay or event happens, and build a cash forecast that carries the business through the winter.
Farm and Ranch Records
Agricultural clients need records that serve the IRS, the lender and the family. We keep crop and livestock inventory, machinery and building depreciation, government program payments and the farm machinery excise tax on equipment purchases, and we separate personal and farm spending clearly. Year-end records are organized for Schedule F or the entity return and for farm income averaging where it helps.
Getting Ready for the 2027 Rate Change
Under current law, the state sales tax rate rises from 4.2 percent to 4.5 percent on July 1, 2027, and county option taxes may begin as early as January 1, 2027. Point-of-sale systems, invoice templates, recurring billing and e-commerce carts all need the new rates on the right day. When the rate last changed in 2023, the Department of Revenue tied the rate to the billing date for accrual-basis sellers and to the payment date for cash-basis sellers. We will apply the department's guidance for the 2027 change and test the new tax codes in your system before the effective date.
Records to Keep and for How Long
The Department of Revenue requires sales and contractor's excise tax records to be kept for at least three years, and longer for depreciating capital assets. That includes invoices, purchase records, exemption certificates and the worksheets behind each return, in paper or electronic form. The IRS generally expects income tax records to be kept for three years after filing and employment tax records for at least four years. We store supporting documents with each month's close so they are easy to find later.
Catch-Up and Clean-Up Work
Many new clients come to us with several months or years of books to rebuild, often because a sales tax notice arrived. We rebuild the ledger from bank records, reconstruct sales by city, compare the result to returns already filed, and identify any amended or late returns needed. Then we move to a regular monthly close.
Remote, With the Software You Use
We work remotely in the cloud accounting software you already use, or help you choose one, and connect bank feeds and sales systems so the data flows in automatically. You get a monthly report and a contact who knows your file.
South Dakota Bookkeeping Questions
How long should a South Dakota business keep sales tax records?
The Department of Revenue requires at least three years, and longer for depreciating capital assets. Keep invoices, purchase records, exemption certificates and return worksheets.
Why do my books need sales by city?
Municipal sales tax and municipal gross receipts tax are reported by city on the South Dakota return. Recording the city on each sale lets the return be prepared directly from the books.
Can you catch up books that are months behind?
Yes. We rebuild the ledger from bank records, reconstruct taxable sales, compare the result to returns already filed and flag any late or amended returns.
How should I prepare for the July 1, 2027 rate change?
Update sales systems, invoices and recurring billing to the new rate on the effective date, follow the Department of Revenue's transition guidance, and test the tax codes before the change.
Talk to BOMCAS About Bookkeeping in South Dakota
Clean books feed everything else we do: the sales and use tax returns each period, payroll reconciliations and the year-end business tax return. They also make tax planning possible, because decisions rest on current numbers. If several years are missing, back taxes and late filing explains how we rebuild them, owners can add their personal returns, and Canadian-owned companies should read about cross-border tax. For a summary of how South Dakota taxes businesses and residents, see the South Dakota accounting and tax overview or our United States services.
Tell us what you need help with and we will reply with next steps. Contact BOMCAS, use the contact form below, call 780-667-5250 or email info@bomcas.ca. You can also go back to the South Dakota overview. This page is general information, not advice for a particular situation.