Why is 'Balance due' the bold figure on my invoice instead of the total?

The totals block, before and after

Take a 9,000 SAR interior design invoice with no tax. Before any payment is entered, the Basic invoice generator shows:

Then you type 6000 as the amount paid, because the client has sent two transfers:

In the PDF both the total and the balance due print in bold, and in the on-screen summary the balance is shown larger than the other rows. The point is that the reader's eye lands straight on the amount the document is asking for.

Why the design makes sense

Picture the client opening the invoice on their phone during a meeting. If the headline figure is 9,000, they may transfer the lot again, or reply puzzled because two thirds is already paid. Highlighting 3,000 heads that off. Meanwhile the total and the payment stay on the page, so an accountant can check the arithmetic without asking you.

When to leave the paid field empty

• A new invoice with nothing paid yet: leave it empty, and the total is what you are asking for.
• A fully paid invoice the client wants for their records: enter the whole amount, and the balance shows a clear 0.00.
• A payment the client has promised but not sent: do not enter it; the field is for money actually received.

Entering 0 as the amount paid is the same as leaving it empty: the paid and balance rows only appear when the amount is above zero.

Keep a record of each payment

The paid figure is your statement; the tool does not verify it and knows nothing about payment dates. So list each payment's date and amount in the notes, and give the client a receipt for each one from the Receipt generator, so the invoice and the receipts form one matching record.