Partial and Final Invoices Explained
Learn when to use advance, partial and final invoices in Germany, which mandatory details they require, and how to avoid duplicate payments and VAT.
For larger orders, one invoice at the end is often not enough: material is pre-financed, milestones are financed, the customer wants interim results. Then provisional invoices and at the end the final invoice come into play. This is everyday life in trades, renovations and IT projects - and errors in billing quickly lead to arguments about “have we already paid?”
This article explains provisional invoice and final invoice in an understandable way: terms, differences, mandatory information and typical errors. Basics: Write an invoice, Quote for craftsmen and Mandatory invoice information 2026.
The terms: not everything is the same
Terms are mixed up in everyday life. Separation helps for clean accounting and customer communication.
| term | Briefly explained | Typical occasion |
|---|
| Partial invoice | Invoice for a completed part of the overall service | Stage finished, e.g. B. Shell construction |
| provisional invoice | Advance payment for services not yet fully provided | Down payment, pre-financing of materials |
| Final invoice | Final billing with deduction of amounts already paid | Order completed |
Partial invoice: Service has been (partially) provided
A partial invoice invoices a partial service already provided. Example: Painting work on the first floor is finished - you only bill for this section. Sales tax applies to the amount invoiced (unless it is a small business).
Advance invoice: Payment before (full) service
A provision invoice requires money in advance or for work that has not yet been completed - classic down payment before construction begins or materials are procured. In tax terms, this is often referred to as input tax deduction for the customer if the invoice is correctly issued.
Final invoice: the rest with deductions
The final invoice lists the total service, deducts advance or partial invoices that have already been issued and demands the remaining amount (or credit in the event of overpayment). Without a clear deduction, double payments or a loss of trust occur.
When advance invoices make sense
Skilled trades and construction projects
Long terms, high material costs, staff commitment – anyone who works for three months without interim payment bears the financial risk alone. Payment plans should be included in the quote for craftsmen: e.g. B. 30% when the order is placed, 40% when the milestone is reached, 30% when the order is accepted.
Agencies and IT
Project start with down payment invoice (down payment), monthly partial invoices for retainer models, final invoice after go-live. The difference between quote and cost estimate comes into play here: Fixed price projects need clear billing logic.
When would you rather an invoice?
Small orders, standard services with a short duration, amounts below your internal threshold - a one-off invoice is simpler and less prone to errors.
Mandatory information: as with every invoice
Every advance, partial and final invoice is an invoice within the meaning of Section 14 UStG (if you are subject to VAT). The usual mandatory information applies:
- full names and addresses
- Tax number or USt-IdNr.
- consecutive invoice number (own number range or together - but without gaps)
- Issue date
- Description of services (also in the case of a deduction: what the payment is for)
- Time of service or notice in advance payment
- Remuneration, tax rate, tax amount
Details and checklist: Mandatory billing information 2026.
Special feature for advance invoices
In the case of deposit before service, the invoice must indicate that it is an advance payment and which service will be provided later. Phrases such as “provisional invoice / down payment for order [reference]” are common.
Special feature for the final invoice
The final invoice must show amounts already paid:
- Number and date of the installment invoices
- Total of the net and gross amounts already paid
- Remaining amount to be paid
Without these lines, the customer will not understand why an amount is still outstanding - and your accounting will have double revenue.
Sales tax: do not bill it a second time
A common mistake: The full order amount is shown with VAT on the final invoice, without deducting the amounts already taxed in advance invoices. Correct is:
- Represent total order (net).
- Deduction of the deductions already made (net)
- Remainder net + VAT on the remainder – or if already paid in full: ID card with zero remainder
The customer may not deduct VAT twice as input tax on the same service. Your final invoice must make this clear to the tax advisor.
Small business owner
Anyone who uses the small business regulation does not show VAT, but rather the § 19 note. Advance and final invoices remain useful - the deduction mechanism then only affects the total amount without a tax column.
From the quote to the final invoice: a continuous process
Quote with payment plan
Record payment modalities in Create quote: percentages, milestones, due date. The customer accepts the plan – not just the final price.
Advance invoice after acceptance
After quote confirmation the first installment invoice with reference to quote number and order description. In Quotavo: confirmed quote as basis, adopt line items and amounts, mark invoice type.
Partial invoices during the course of the project
For stages, a new invoice with own service date and a clear description of the phase performed. Status in Status Area helps to see open stages.
Final invoice with deduction table
At the end a final calculation with:
- Short description of the entire order
- Table: deduction 1, deduction 2, ... with amounts
- Balance to be paid
Optional: Acceptance protocol or reference to the acceptance date as the time of performance.
E-invoice for advance and final invoices
From the known deadlines, companies must be able to receive e-invoices; The shipping obligation in B2B is staggered. Each interim and final invoice is a regular invoice - ZUGFeRD or XRechnung where required, not just PDF.
For final invoices with deductions, the structured data must meaningfully reflect the reference to advance invoices (depending on the format and profile). Practice often: PDF/ZUGFeRD with a clear deduction table in the visible part. More: E-Invoicing and ZUGFeRD.
Industry example: bathroom renovation
| step | document | Amount (example) |
|---|
| Quote | Quote No. 2026-042 | €18,000 total |
| Order | Confirmation + 30% deposit | Advance invoice €5,400 |
| Rough installation completed | Partial invoice | €7,200 |
| Acceptance | Final invoice | €18,000 − €5,400 − €7,200 = €9,600 |
Each invoice has its own number, date of service and reference to the quote. The customer sees in the final invoice why €9,600 is still due.
Typical mistakes
Final invoice without deductions
Customer pays twice or months of dispute ensue. Always list all prepayments.
Deduction without reference to benefits
“Deposit €5,000” without an order reference – tax and legal shaky. Always: what for, what order, what quote.
Different number ranges without logic
Advance invoices in a separate number range can work, but they must be complete and traceable in the accounting department. Software with automatic allocation prevents gaps – see Write an invoice.
Forgot reminder about remaining balance
Remainder outstanding after final invoice - Write a reminder with reference to the final invoice number, not to old deductions.
Further questions: FAQ.
Frequently asked questions (FAQ)
What is the difference between partial invoice and partial invoice?
The provision invoice typically requires advance payment before (or without) full service. The partial invoice invoices a partial service that has already been provided. Both are full-fledged invoices with mandatory information.
Does every advance invoice have to show VAT?
If you are subject to VAT: yes, on the billed amount of the advance invoice. The customer can deduct input tax if the invoice is correct. Small business owners instead § 19 notice.
How do I formulate the final invoice?
Header: “Final invoice for order / quote [number]”. Body: total, table of invoices already issued with amounts, remaining amount to be paid. Date of service = acceptance or last day of service.
Can I submit more installment invoices?
Yes, as long as the total order is not exceeded and each invoice is correct. The customer should know the payment plan in the quote.
Do I need a new quote for each discount?
No. A quote (or contract) covers the order; Advance and partial invoices are billing steps. Additional quotes only if the scope of services changes - see quote or cost estimate.
Does Quotavo support advance and final invoices?
Quotavo connects quote and invoice: generate invoices from confirmed quotes, adopt customer data and items. For complex deduction tables in the final invoice, check the current functionality in the Manual documentation or test the workflow with your payment plan.
Conclusion
Provisional invoice and final invoice structure large orders financially and legally. The key is the consistent connection from the quote to every deduction to the final invoice with a clear deduction table. Anyone who reflects this in software and processes reduces disputes, secures liquidity and remains on the safe side when it comes to VAT and e-invoice.
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