Bookkeeping services in Portland, overseen by a CPA

Bookkeeping in Portland that is built for tax time

Good books answer two questions: how much did the business make, and where did the money go. For a Portland business, the same numbers also decide which local taxes apply. The City of Portland and Multnomah County business taxes both use gross receipts to decide who is exempt, and the Oregon Corporate Activity Tax looks at Oregon commercial activity. If sales are recorded in the wrong place or not at all, the tax picture is wrong too.

That is why bookkeeping under a CPA's eye is different from simply entering receipts. The person reviewing your books knows which figures will end up on Form 1120-S, the Oregon return and the city and county return, so the categories are set up with those forms in mind from the start.

Requests sent through Accountants Portland go to a licensed CPA in our Portland area network. Depending on the size of the business, that CPA may do the bookkeeping directly or supervise a bookkeeper on their team and review the work each month.

What monthly bookkeeping includes

Monthly bookkeeping is a routine, not a project. Each month the transactions from your bank, card and payment accounts are categorized, then the balances are checked against the statements so nothing is missing or counted twice.

Owners who mix personal and business spending in the same account create the most cleanup work. A separate business bank account and card make every later step faster, from the monthly reconciliation to the Schedule C or Form 1120-S at year end.

A typical monthly service for a small Portland business covers the following:

• Categorizing bank, credit card and payment processor activity
• Reconciling every account to its monthly statement
• Recording loans, owner draws and transfers correctly
• Tracking money owed to you and bills you owe
• Matching payroll reports to the books
• A monthly profit and loss statement and balance sheet

Catch up bookkeeping for books that fell behind

Plenty of owners fall a few months or a full year behind. A busy season, a bookkeeper who left or a switch in software is usually the cause. Catch up bookkeeping works through the missing months in order, starting with bank statements, until the books match reality again.

Deadlines are often what forces the issue. A partnership or S corp return for a calendar year is due on the 15th day of the 3rd month after year end, which was 3/16/2026 for tax year 2025, and the Portland and Multnomah County business tax return is generally due 4/15. If the books are not ready, an extension buys time to file but not to pay, so it helps to start the cleanup early.

When you request a quote, tell the CPA how many months are behind and how many accounts are involved. Catch up work is usually quoted separately from the ongoing monthly service.

Catch up work also uncovers problems that are better found early, such as a vendor charged twice, a payment processor fee that rose without notice or an account nobody has looked at in months.

How long to keep your business records

The IRS general rule for small businesses is to keep records for three years, depending on the type of record. Employment tax records have a longer rule: keep them for at least four years after you file the fourth quarter return for the year. Some situations call for even longer, so ask your CPA before you shred anything.

Good bookkeeping also means the paper trail is easy to find. Receipts, invoices, bank statements and payroll reports should be stored so that any number on your return can be traced back to its source document. If the IRS or the Oregon Department of Revenue ever asks a question, that trail is what answers it.

Digital storage makes this simpler. Scanning receipts into a folder for each month, or attaching them to transactions in your bookkeeping software, means nothing fades or goes missing in a drawer.

When a record supports something that lasts several years, such as equipment you depreciate or a building you own, the general three year rule may not be enough. Your CPA can tell you which records to keep longer.

Bookkeeping that supports Oregon and Portland filings

Clean books feed directly into filings that many owners do not think about until they are due. Quarterly payroll reports to Oregon on Form OQ pull from your payroll records. The Portland and Multnomah County return asks for figures from your federal return, which comes from your books. Partnerships and S corps that make Oregon's PTE-E election need accurate distributive proceeds figures for each owner.

Growing businesses benefit the most. The City of Portland gross receipts exemption is under $75,000 for tax year 2026 and under $100,000 from tax year 2027. Oregon CAT registration is required within 30 days of reaching $750,000 in Oregon commercial activity. Monthly books show you where you stand against those lines while there is still time to act.

The reverse is true as well. Once you know you are below a threshold with room to spare, that is one less thing to worry about during the year. Books that are current every month are what let you know either way.

Contractors, payroll and year end forms

Bookkeeping is also where your year end forms come from. If you paid independent contractors, the books need to show who was paid and how much, because Form 1099-NEC reports that nonemployee pay. For payments made in 2025, Form 1099-NEC was due 2/2/2026, the same date employers had to give employees their W-2 forms.

Collecting contractor names, addresses and taxpayer identification numbers when you first pay someone saves a scramble in January. A bookkeeper who tags those payments as they happen can produce the list in minutes.

For businesses with employees, the payroll side of the books has to agree with the quarterly Oregon Form OQ and federal Form 941 reports. When the numbers do not match, the difference usually points to a missed payroll, a manual check or a benefit deduction recorded in the wrong place. Finding that in the month it happens is much easier than finding it at year end.

Getting a bookkeeping quote

Tell us what you need and a licensed CPA who works with businesses like yours gets in touch with a clear, fixed quote. The quote depends mostly on how many transactions you have each month, how many accounts need reconciling and whether you need catch up work first.

Mention the software you use now. If your records live in spreadsheets or a shoebox of receipts, say that too. The CPA can tell you what will change and what can stay the same.

Once monthly work is running, most owners only need to send a few items each month, such as receipts for card purchases and notes on anything unusual. The rest comes straight from bank feeds and statements.

Common questions