[Direct answer]In the Beijing area, failure to write a contract does not mean the deal will be indefinitely delayed. According to Article 501 of the Civil Code, the contract can be supplemented by agreement. If the supplementation fails, the terms of the contract or the trade practices shall be used to determine the terms; if it is still impossible to determine the terms, the buyer shall pay at the same time as receiving the subject matter or picking up the documents—this is a statutory fallback rule requiring simultaneous payment and delivery. The determination of the payment time directly determines the starting point of interest and the statute of limitations. It is necessary to clarify the accounts and document the evidence in writing.

1. Problem background and typical scenarios

The contract only stipulates that "the payment shall be made after the goods arrive and pass the inspection", without specifying the exact timeframe. When the supplier presses for payment, the purchaser replies, "The contract doesn't specify the time, so we're not in breach of contract." The lack of a clear payment deadline is a common loophole in corporate contracts, but it's not a shield for defaulting parties. The rules clearly provide supplementary paths and fallback provisions, but the key lies in whether the supplier can effectively utilize these mechanisms.

II. Key points of contention

First, the three-tier supplementary rules for payment time. Second, the application of the "simultaneous payment" fallback clause. Third, the determination and evidence of transaction habits. Fourth, the linkage between payment time and interest and statute of limitations.

III. Professional analysis by Henglue Lawyers

The first layer involves three-step supplementary rules: Article 501 of the Civil Code - First step: Supplementary agreement (sending a letter proposing a payment deadline, and the other party's written confirmation constitutes a supplementary agreement); Second step: Determined according to relevant contract terms or transaction practices (if the contract states "monthly settlement" or the parties have always paid within 30 days after delivery in previous transactions, the standard practice shall apply); Third step: If still uncertain, the default rule applies. The second layer concerns default provisions: Article 501(4), where the performance period is unclear, the debtor may perform at any time and the creditor may request performance at any time, but must allow the other party reasonable preparation time. - Corresponding to the payment scenario in sales contracts: The buyer shall pay the price upon receiving the subject matter or picking up the documents, i.e., "simultaneous payment"; After the supplier issues a reminder, the buyer shall allow a reasonable preparation period (e.g., 15 days). Failure to pay within the period constitutes a delay, and interest shall be calculated from the expiration of the preparation period. The third layer involves evidence of transaction practices: Industry standards (industry payment cycle documents, industry association rules), past transactions between the parties (historical contracts, reconciliation statements showing common payment cycles), and local customs for similar transactions. - Historical reconciliation statements are the most powerful evidence: If the last twelve orders were all settled within 30 days after delivery, the current order without a specified timeframe shall follow the same practice; Statements like "following our usual practice" in WeChat communications can also corroborate this. The fourth layer highlights the interconnected effects: Once the payment time is determined, overdue interest shall be calculated from that point (according to the agreed terms or LPR + add-on); The statute of limitations begins three years after the expiration of the payment deadline - each reminder or reconciliation confirmation restarts the statute of limitations; For contracts with unclear payment terms, it is crucial to conduct frequent reconciliations and document the unclear timelines with written actions. The fifth layer offers practical advice: Review existing contracts for missing payment terms and sign supplementary agreements; Write clear payment terms in new contracts, such as "payment within X days after delivery, with interest calculated at XX% for overdue payments"; For unwritten transactions (oral cooperation with regular customers), specify the "due date" on each batch of goods' reconciliation statements; Keep records of collection efforts (emails, EMS letters, WeChat reminders), and preserve time-line evidence with delivery receipts.

IV. Practical suggestions and legal basis

The first step is to send a letter proposing a payment deadline and seeking to supplement the agreement; the second step is to collect evidence of historical transactions and industry practices; the third step is to claim delay after the grace period; and the fourth step is to manage interest and statute of limitations simultaneously. The main legal basis: Articles 501, 501, and 628 of the Civil Code of the People's Republic of China, and relevant provisions of the Interpretation of the Supreme People's Court on the Application of Law in the Trials of Disputes over Sales Contracts; the specific application shall be subject to the currently effective provisions.

5. Henglu Law Firm's Advice

There are three principles regarding payment time: first, negotiate with the other party if there's no written agreement; second, follow local customs; and finally, agree on "payment upon delivery of the goods". After giving sufficient notice to the other party for payment, failure to pay on time will be considered a delay, and interest will still be charged. Historical account statements are the most solid evidence of transaction practices. For vague contracts, it's even more important to conduct regular account reconciliations and keep records. For disputes involving payment terms and payment issues, you can seek legal assistance through legal channels.Business and contract disputes in enterprisesWe provide a comprehensive solution for services, which includes the management of accounts receivable.Intellectual property protection and corporate lawFor plates related to the enforcement of arrears, you can refer to the relevant content for reference.Creditor's rights and debts, and enforcementFor columns related to contract review, you can consult us for specific adviceSpecial servicesTeam.

VI. Frequently Asked Questions

Q1: If the other party says that the contract doesn't specify a timeframe, can they delay it at any time?

No. If the performance period is unclear, the creditor may request performance at any time and give the necessary preparation time; in the sales contract, the buyer should pay the money when receiving the goods, and the delay in payment constitutes a default.

Q2: How can we prove our trading habits?

The most convincing evidence is the usual payment terms shown in historical contracts, invoices, and settlement records, supported by industry-standard materials and chat records of the "old rules" between the two parties.

Q3: How long is a reasonable preparation period after being given a notice of default?

Based on the industry and the amount involved, the payment period is generally between 15 and 30 days. The reminder letter will specify the deadline, and if the payment is not made by the deadline, the responsibility for delay and interest will be calculated accordingly.

Q4: If the payment time is not specified, when does the statute of limitations for litigation begin to apply?

After the payment period is determined by supplementation or in accordance with customary practice, it shall be calculated from the expiration of that period. The date on which the performance period determined by the reminder expires shall also be the starting point of the statute of limitations.

Q5: What should I pay attention to when signing a payment time agreement for retroactive payments?

Please specify the specific number of days and the starting point (the number of days after the acceptance is completed), the interest rate for late payment, and the continuation of the validity of the other terms of the original contract. Both parties shall sign the contract to prevent verbal revisions.

The above answer is based on the judicial practice in Beijing. The adjudicative opinions in other provinces and cities may vary. For specific cases, please refer to the local rules and evidence situation.

If you are facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the evidence materials, to avoid missing the statutory time limit. →Business and commercial legal services·Beijing Henglu Law Firm

Disclaimer: This article is compiled based on current effective laws and regulations and public adjudication rules, and is for general reference only. It does not constitute a formal legal opinion on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. In case of disputes, please consult a practicing lawyer in time.