Work remuneration after partial acceptance: due date, defects reservation and lawsuit

After documented partial acceptance, one narrow question becomes important: is the work remuneration for that stage already due even though the entire project is unfinished? Section 1170 of the Austrian Civil Code generally links payment to completion of the work. Where the work is carried out in defined sections, however, the contractor may claim a proportionate part of the remuneration earlier.

The review must connect the stage, acceptance, agreed payment mechanism and outstanding amount. A defects reservation belongs in the same chronology, but it does not by itself determine the due amount or establish that every disputed item is justified.

This article deals with work remuneration after a specific partial acceptance. General open invoices, time-and-materials charges, construction delay and the final account for a fully completed work raise separate questions.

Establish the work stage and partial acceptance first

Section 1170 of the Austrian Civil Code names completion of the work as the rule for payment. For work performed in defined sections, it allows a proportionate part of the remuneration to be claimed earlier. It does not set a fixed percentage. The stage and its contractual billing basis must be identified in the individual case.

Partial acceptance may appear in a record, an expressly identified handover, an approval or another statement. Use of a partly completed result can be an important indication, but it does not automatically replace an agreed acceptance. A stage invoice alone likewise does not prove that the stage was completed and billable.

The contract, specification, variations, acceptance statement and invoice therefore have to be read together. The outstanding stage amount must follow from the agreed work and price. Work not yet accepted and later additional work should be shown separately.

Review the defects reservation and due date separately

A defects reservation records an objection at acceptance or afterwards. Under section 1167 of the Austrian Civil Code, the general rules on contracts for consideration, including sections 922 to 933b, apply to defects in the work. The review should therefore identify the affected stage and the remedy requested.

The phrase “subject to reservation” is not enough to complete the assessment. Its content, timing and scope matter. A specific description can confine the quality issue to individual items. A general statement leaves open whether the entire stage amount, particular costs or only rectification are being disputed.

The account should show undisputed and disputed items separately. This prevents a dispute about one part of the work from being merged with the entire remuneration claim. At the same time, partial acceptance should not be presented as final confirmation of quality where the record expressly notes defects or unfinished work.

Derive due date and evidence from one chronology

The first review needs a short chronology: order, agreed stage, performance, partial acceptance, defects notice, stage invoice, payment term and payments made. Each date should be linked to a document or a traceable communication.

The calculation should list the price for the stage, variations, credits, partial payments and outstanding balance separately. A lump sum makes review harder when the client disputes individual items. Where there are several accepted stages, prepare a separate calculation for each one.

Keep the acceptance record and defects reservation in full. Plans, photographs, inspection records, delivery notes, emails and payment evidence may add useful support. The conduct after acceptance should not be given a broader meaning than the documents support.

Classify counter-performance and unfinished work

Section 1052 of the Austrian Civil Code concerns when one party may insist on delivery after performing, or offering to perform, its own obligation. In a work-fee case, it is therefore important to identify what the contractor has delivered for the claimed stage and whether an agreed counter-performance is still outstanding.

Unfinished work, missing documents or agreed rectification should not disappear inside one total amount. A client’s alleged counter-performance should also be identified specifically. This allocation shows whether the dispute concerns due date, amount, quality or a separate payment claim.

A dispute about security, retention or rectification requires a separate review of the contract and the particular defects. Calling a statement a defects reservation does not determine its legal effect. It is the starting point for classifying the affected work and the next step.

Prepare the claim for the stage payment

Before a lawsuit, the claim should be understandable from the contract and the calculation. It should identify the work stage, remuneration agreement, partial acceptance, amount claimed, payments and response to defects. With several stages, the statement should explain each item separately.

Match each piece of evidence to the relevant allegation. The acceptance record proves a different point from the invoice, photographs or correspondence about rectification. A factual demand can summarise the open stage amount and the supporting documents before court proceedings are considered.

The appropriate route depends on the dispute about stage, due date, defects and amount. The article Defects notice and open invoice deals with the general response to objections. For partial acceptance, the key remains the specific work already documented as its own stage.

Review limitation risk for the stage amount

Section 1486 of the Austrian Civil Code provides a three-year limitation period for claims arising from work or other services in a business, where the requirements of the provision are met. Work remuneration from a commercial work contract may fall within this rule.

For a stage claim, the relevant point should not be taken mechanically from the date of the final invoice. For each stage, review the agreement, due date, acceptance and later communications. Acknowledgements, payments or court proceedings can create further limitation questions and require their own assessment.

Separate the documents by stage at an early point. This makes it possible to see whether only one item is old, whether the client has partly confirmed the claim and which balance is actually being pursued.

Work remuneration after partial acceptance: key questions