invoicewritenow

Consultants

Invoicing built for retainers, milestones and billable hours

Corporate clients want a tax invoice with their PO number, on time, every month. InvoiceWriteNow issues it automatically and tells you the moment it is overdue.

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Sounds familiar?

  • Retainers billed late

    The first of the month arrives and the invoice is still in your head.

  • Accounts departments bounce invoices

    A missing VAT number or PO reference costs you a 30-day cycle.

  • Scope creep is not billed

    Extra work that is not itemised is work you gave away.

How InvoiceWriteNow handles it

  • Recurring monthly invoices

    Set the retainer up once; each month gets the next invoice number and due date automatically.

  • Tax invoices that pass first time

    VAT number, client VAT number, PO reference and 15% VAT handled for you.

  • Quotations to invoices

    Proposal accepted? Convert it without retyping a line.

  • Custom numbering

    Business plan lets you match the numbering your clients' systems expect.

A sample invoice for consultants

Northbound Strategy Consulting

12 Loop Street, Cape Town, 8001

✉ [email protected]☎ +27 21 000 0000

INVOICE

INV-0042

DUE IN 14 DAYS

ISSUE DATE

14 Sept 2026

DUE DATE

28 Sept 2026

PAYMENT

Once-off

FROM

Northbound Strategy Consulting

12 Loop Street, Cape Town, 8001

✉ [email protected]

☎ +27 21 000 0000

BILLED TO

Mokoena Logistics Holdings

45 Rivonia Road, Sandton, 2196

✉ [email protected]

DESCRIPTIONQTYPRICETOTAL
Monthly advisory retainer: September 20261ZAR 18,000.00ZAR 18,000.00
Board workshop facilitation (additional)1ZAR 7,500.00ZAR 7,500.00
Travel: Johannesburg to Durban1ZAR 2,340.00ZAR 2,340.00

▪ NOTES

PO 4471-B. Payment terms: 30 days from invoice date. Overdue amounts attract interest at 2% per month.
Subtotal:ZAR 27,840.00
Tax (15%):ZAR 4,176.00
Total:ZAR 32,016.00

▪ BANKING DETAILS

BANK NAME

First National Bank

ACCOUNT NAME

Northbound Strategy Consulting

ACCOUNT NUMBER

62000000000

BRANCH CODE

250655

REFERENCE

INV-0042

Thank you for your business!
Payment is due within 14 days.
Invoice generated on 14 Sept 2026
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Guides for consultants

5 min readRecurring invoices for retainers and subscriptions: a practical guideHow to set up recurring monthly invoices for retainer clients, what to put on them, how to handle price changes and scope creep, and how to automate the whole thing.Read more6 min readSARS tax invoice requirements: the full checklist (2026)Exactly what a valid South African tax invoice must contain under section 20 of the VAT Act, including full vs abridged tax invoices, the R5 000 and R50 thresholds and the 21-day rule.Read more5 min readInvoice payment terms explained: Net 30, COD, deposits and what works in South AfricaWhat payment terms like Net 30, due on receipt, COD and 50% deposit mean, which ones get paid fastest, and how to write terms that hold up when a client pays late.Read more

Frequently asked questions

Can I bill hours and fixed fees on one invoice?

Yes. Each line has its own quantity and unit price, so hourly lines and fixed lines sit together.

Can a client's PO number appear on the invoice?

Yes, add it to the notes or the customer record so it appears on every invoice for that client.

Do you support multiple team members?

The Business plan supports up to ten team members with approvals for documents before they are sent.

Invoicing for consultants, sorted.

Free plan, no card, first document in two minutes. Upgrade when the invoices start stacking up.

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