Sage for New Founders: What to Set Up First

Start with a clear business profile, tax posture and document discipline

Before entering your first sales or expenses, complete the basic profile for your business inside your accounting software. Add your legal business name exactly as registered (or used for self‑employment), trading name if different, registered or principal address, and contact details. If you sell to customers who need invoices for their records, set a clean invoice template with your branding and legally required details. Decide a consistent invoice numbering approach before you send the first one. If your software allows you to set a preferred format, configure it; if not, keep a simple external sequence and follow it precisely.

Your tax posture also belongs in the basics. Confirm your business type (for example, sole trader or limited company), any tax registrations relevant to you, and your financial year or accounting period dates. These elements affect how you interpret your reports and prepare submissions. If you are unsure what applies to you, a short chat with an accountant is well spent at this stage. They can help you avoid reworking months of entries because a setting was off by a small but important detail.

Document discipline is the third leg of a strong setup. GOV.UK explains the records self‑employed people must keep. Even if you operate a company, the spirit is the same: preserve a clear trail of the money coming in and going out, and keep evidence you can retrieve. Decide how you will store digital copies of receipts, bills, bank statements and contracts. Name files consistently and put them where colleagues (or your accountant) can find them. If your accounting software lets you associate files with entries, use that. If it doesn’t, keep a folder structure that mirrors your ledger categories and dates so cross‑checking is quick.

• Enter your legal name and trading name exactly as used in contracts and invoices.
• Set a consistent invoice numbering sequence from day one and apply it without gaps.
• Confirm your business type and accounting period dates before posting transactions.
• Create a simple folder structure for digital documents that mirrors your categories.
• Review GOV.UK guidance on business records and align your evidence‑keeping to it.

Keep your chart of accounts lean and aligned to decisions

A chart of accounts is simply the list of categories you post money into. Founders often create too many at the start, chasing precision that turns into noise. Keep it lean. If a category will not change a decision you make this quarter or help your accountant, group it with a broader one. Fewer, clearer categories make coding faster, reports clearer, and year‑end queries shorter.

Sage and similar tools usually come with a starting set of income, cost and expense categories. Resist deleting standard categories unless you have a strong reason; you can hide rarely used ones and add only where you truly need extra insight. For example, a service business may want separate categories for recurring service income and project income, but lump all small software subscriptions into a single “software” line. What matters is that the categories reflect how you talk about the business.

Finally, be consistent with tax treatment and naming. If your business collects taxes on sales or has expenses with different tax treatments, label categories clearly so the correct tax code is obvious at posting time. If you are unsure about a category’s usual treatment for your situation, ask an accountant to review your list early. A half hour of setup help can prevent systematic mis‑categorisation that takes much longer to unwind later.

• Start with broad categories; only split a line when it changes a decision.
• Name categories in plain English so anyone on your team can code accurately.
• Avoid duplicates that differ only by punctuation or tense.
• Document one or two examples under each category to guide future coding.
• Ask an accountant to review your list before you import or start heavy posting.

Build sales and purchase workflows that match real life

Reliable books come from processes that mirror how you actually work. Map the real steps from a lead becoming a sale to cash in the bank: estimate or quote, customer approval, invoice issue, payment received, and any refunds or credits. Do the same for purchases: quote or order, goods or services received, bill, payment, and returns. Then implement only the software steps you truly need to reflect those events. Keep it as short as possible while preserving a clear audit trail.

For sales, decide in advance how you will treat deposits, staged invoices, and credit notes. Set default payment terms that reflect what you agree in your contracts. Make it routine to record when you have delivered what the customer paid for, not just when cash arrives. This keeps your pipeline, debtors and revenue view aligned with reality. For purchases, create supplier records with the essentials and record bills when you commit to pay, not only when you make the payment. That way, cash‑flow forecasts and unpaid bills reports are immediately useful.

Throughout, attach or organise the supporting documents. A customer dispute is easier to resolve when the quote, acceptance and invoice match line by line. A supplier bill with line details helps you code correctly and reminds you to check whether goods were received. Consistency turns your accounting system into a mirror of the business, not an after‑the‑fact list of bank entries.

• Write a simple flow for sales and purchases that reflects how you actually trade.
• Create customer and supplier records with clear names and contact details.
• Record invoices and bills when agreed, not only when paid, for a true commitments view.
• Decide and document how to handle deposits, staged billing and credit notes.
• Keep supporting quotes, contracts and bills organised to match the ledger.

Set up banking and reconciliation routines you will actually do

Your bank account is the ground truth for cash. The job of bookkeeping is to make your ledger match that reality with an explanation for each movement. Whether you import bank statements, use automated connections, or manually enter transactions, the principle is the same: reconcile your records to the statement at a regular cadence you can sustain. Little and often beats a quarterly scramble.

Create separate bank and payment method accounts in your software to reflect how money moves. If you take card payments through a processor, consider maintaining an account in the ledger for the processor so that customer receipts, fees and payouts can be seen clearly. Record transfers between accounts explicitly rather than coding them to income or expenses. This helps avoid double counting and makes cash positions easier to understand.

During reconciliation, investigate differences rather than forcing matches. If a bank line does not match an expected invoice payment or supplier bill, there is a reason. It might be fees, a partial payment, a refunded sale or a simple typo. Build a short checklist for reconciliations and work through it calmly. If a difference persists, park it in a suspense category and seek help soon rather than letting old mismatches pile up.

• Reconcile to bank statements on a schedule you can maintain.
• Set up separate ledger accounts for each bank, card processor and petty cash.
• Record inter‑account transfers explicitly to avoid misclassifying cash movement.
• Use a simple checklist to investigate differences rather than forcing matches.
• Clear suspense items promptly; ask an accountant if a mismatch lingers.

Prepare for Making Tax Digital for Income Tax and tidy record‑keeping

Making Tax Digital for Income Tax brings specific software and record‑keeping requirements for those within scope. Before you commit to a workflow, review the GOV.UK guidance on choosing the right software for Making Tax Digital for Income Tax. Use that page to check current requirements and to confirm whether the software you plan to use is compatible for your situation. If you decide to use Sage, check Sage’s UK product information to see which product options are designed to support the workflows you need.

Even if you are not currently required to follow Making Tax Digital for Income Tax, adopting tidy digital records now reduces friction later. The GOV.UK guidance on records for the self‑employed sets out the kinds of business records you need to keep. Map those to your categories and decide how you will preserve summaries and supporting evidence. It is easier to build a digital trail from day one than to scan boxes of receipts later in the year.

Finally, clarify with your accountant how they prefer to receive data. Some advisers want you to reconcile and categorise everything and will ask only occasional questions. Others prefer to review before quarter‑end or year‑end and will adjust entries for consistency. Agree the division of labour and how to flag uncertainties. Good records plus clear hand‑offs make compliance events far less stressful.

• Check the GOV.UK guidance on choosing software for Making Tax Digital for Income Tax.
• Confirm with Sage which product options support the workflows you need.
• Map GOV.UK record‑keeping expectations to your categories and processes.
• Decide where and how you will store digital copies of supporting documents.
• Agree roles with your accountant and how to handle uncertain items.

What to do, in order

1. 1

   Decide the scope and confirm essentials

   Confirm your business type, accounting period dates and any tax registrations relevant to you. Review GOV.UK guidance on business records and, if Making Tax Digital for Income Tax might apply to you now or in the future, read the GOV.UK guide on choosing compatible software.

2. 2

   Set your business profile and invoice approach

   Enter your legal details, trading name and address in your accounting software. Choose a clean invoice template and decide a consistent numbering format that you can maintain from the first invoice onward.

3. 3

   Design a lean chart of accounts

   Start with broad, decision‑useful categories for income and expenses. Document a couple of example transactions under each to guide consistent posting. Ask an accountant to review the list before you import or begin heavy posting.

4. 4

   Map simple sales and purchase workflows

   Write down the real steps from quote to cash and from order to payment, then reflect only the steps you truly need in the software. Create concise customer and supplier records and agree how you’ll handle deposits and credit notes.

5. 5

   Establish a reconciliation rhythm

   Create ledger accounts to mirror each bank or payment channel you use. Reconcile your records to statements on a frequency you can maintain. Investigate differences rather than forcing matches and clear suspense items promptly.