To be clear from the outset: no statute sets a response-time (SLA) obligation for retainer-based legal advisory services. The widely quoted “24–48 hours” figure is market practice, not a legal requirement. Response times under a retainer are a matter of contract — whatever the parties agree in the agreement is what applies. So the right question is not “what does the law require”, but “what should we negotiate”. This article examines current market practice and the points worth locking down during negotiations.
1. Why there is no hard legal answer for retainer SLAs
A retainer agreement is, in substance, a service contract between a business and a law practice. The law provides the general framework for contractual relations, but does not prescribe operational details such as “must reply to emails within X hours” — those are commercial terms left to the parties’ freedom of contract. Consequences:
- No legal instrument sets an SLA response time for retainers; every figure in this article is practice, not a binding legal standard.
- An SLA is only binding when written into the signed retainer agreement — verbal promises or marketing brochures do not automatically become contractual obligations.
- If the agreement says nothing about response times, the adviser is only bound by the general duty to perform the agreed work; “slow replies” are then very hard to characterize as a breach.
2. Market practice: 24–48 business hours
Under prevailing practice in Vietnam (including recommendations from YP Law Firm that many firms reference), 24–48 business hours is the common benchmark for routine advisory requests under a retainer. Points often misunderstood about this benchmark:
- Business hours, not clock hours: 48 business hours can mean roughly six calendar days if weekends intervene — so the agreement should define “business hours” clearly (e.g. 8:00–17:30, Monday to Friday, excluding public holidays).
- Tiered urgency: practice typically distinguishes (a) routine requests — 24–48 business hours; (b) urgent requests — same-day or within hours; (c) critical situations — an out-of-hours contact mechanism (duty phone, dedicated chat group).
- Acknowledgement is not a full answer: many firms commit to acknowledging receipt within a few hours, then delivering the substantive advice within 24–48 business hours. These two milestones should be separated in the contract.
3. Tiered SLAs by package: 12h / 4h / 2h for premium tiers
For premium retainer packages (higher fees, broader scope), market practice shows faster commitments, usually tiered:
- Standard package: 24–48 business hours for routine requests.
- Enhanced package: around 12 business hours, with a dedicated contact and priority channel.
- Premium / priority package: 4 hours, or even 2 hours for urgent matters; out-of-hours and weekend support under agreed mechanisms.
Again: the 12h/4h/2h figures are commercial practice, not legal requirements. A “4-hour premium commitment” is that provider’s contractual promise, binding only the parties who signed it — not a general legal duty.
4. Five points to lock down when negotiating an SLA
- Time definition: how “business hours” are counted, and whether weekends and holidays are excluded.
- Request classification: what qualifies as “urgent” (e.g. matters involving procedural deadlines, inspections, live deal negotiations) — to avoid disputes every time something is time-sensitive.
- Out-of-hours mechanism: who the contact is, through which channel, during which hours; how out-of-hours charges are calculated.
- Remedies for delay: e.g. fee reduction for that month, or a right to review the agreement — without a remedy, an SLA is decorative.
- Reasonable exceptions: situations excused from the SLA (requests lacking input information, force majeure, matters outside the package scope requiring a supplementary quote).
Frequently asked questions
Is a lawyer who replies after 3 days breaking the law?
No — because no law sets such a deadline. It is only a breach of contract if the signed retainer agreement contains a specific SLA commitment that was not met.
Should we demand a 2-hour SLA for every retainer package?
Not realistic. Faster SLAs cost more because the firm must keep resources on standby. Negotiate tiered SLAs: fast for urgent matters, 24–48 hours for routine ones.
Does a commitment in a proposal email count like a contract?
Only if it is incorporated into the signed agreement (or the agreement refers to the proposal). Safest is to write the SLA directly into the retainer contract.
What is the typical term of a retainer agreement?
That is a different question — about the contract’s duration (market practice: 12 months with auto-renewal), not response SLAs. See our separate analysis on retainer agreement terms.
Sources
- The 24–48 business-hour and 12h/4h/2h figures in this article are market practice (referencing YP Law Firm recommendations); no statute sets an SLA response time for legal retainer agreements.
- Response times are contractual terms between the business and the law practice — binding as agreed in the signed contract.
Negotiating a retainer package and need to review SLA clauses, response-time commitments and emergency handling mechanisms in the advisory agreement? Reach us via the Contact page of FLAT Law Firm.
The legal content of this article is reviewed by FLAT’s AI Legal Council and submitted to the owner for approval; it is not an opinion of a licensed lawyer and does not replace legal advice for specific cases.
For reference only, not legal advice.
