Using “Shall” vs “Should” in Formal Legal English: The Ultimate Guide

The words you choose in a legal contract can make or break a business relationship. A single syllable can shift a statement from a friendly suggestion to a strict, legally binding requirement. This is especially true when analyzing the nuances of using “shall” vs “should” in formal legal English.

For lawyers, corporate executives, and contract drafters across Tier 1 jurisdictions like the United States, United Kingdom, Canada, and Australia, misusing these two modal verbs is a frequent source of litigation.

This comprehensive guide clarifies the differences, outlines modern drafting trends, and provides actionable examples to ensure your legal documents remain precise and enforceable.

The Core Distinction: Obligation vs. Recommendation

At its heart, the choice between these two words comes down to enforceability.

• “Shall” creates a mandatory duty. It means “has a duty to” or “is required to.” When a party signs a contract containing this word, they are legally bound to perform that specific action.
• “Should” expresses a recommendation, advice, or a strong expectation. It does not carry the weight of a strict legal command. Instead, it implies what is desirable or prudent rather than what is compulsory.

Because formal legal English requires absolute certainty, mixing up these terms can lead to severe contract disputes.

The Problem with “Shall” in Modern Legal Drafting

While using “shall” vs “should” in formal legal English sounds straightforward, “shall” has become notoriously problematic in corporate law. Over centuries, lawyers have slipped into using “shall” to mean things other than strict obligation.

Legal experts note that “shall” is frequently misused to express:

• The future tense: “The contract shall expire next year.”
• A false imperative on inanimate objects: “The notice shall be written in English.”
• A statement of fact: “The party shall be entitled to a refund.”

Because “shall” can mean so many different things, modern courts sometimes view it as ambiguous.

The Shift Toward “Must”

To eliminate confusion, many legal bodies—including the U.S. Federal Rules of Civil Procedure and the UK Office of the Parliamentary Counsel—now advocate replacing “shall” with “must” when expressing a strict obligation. “Must” leaves no room for interpretation. However, if you are working with traditional templates, knowing how to balance “shall” and “should” remains vital.

When to Use “Should” in Legal Documents

If “shall” (or “must”) is reserved for strict obligations, where does “should” fit into formal legal English?

“Should” is typically used in non-binding sections of legal texts. You will often find it in:

• Recitals and Preambles: The introductory paragraphs of a contract that explain the background and intentions of the parties, rather than their specific duties.
• Corporate Governance Guidelines: Internal company policies that outline best practices for employees or board members rather than hard legal mandates.
• Non-Binding Letters of Intent (LOIs): Documents used during initial negotiations to show what the parties expect to happen, before a final contract is signed.

Key Differences at a Glance

100 Example Sentences

To help you master using “shall” vs “should” in formal legal English, here are 100 clear, short, and meaningful example sentences categorized by their specific legal context.

Category 1: Absolute Contractual Obligations (“Shall”)

1. The Tenant shall pay the rent on the first day of each month.
2. The Buyer shall deposit the funds into the escrow account today.
3. The Provider shall deliver the software updates within thirty days.
4. The Executive shall devote their full business time to the Company.
5. The Contractor shall obtain all necessary building permits before construction.
6. The Licensee shall maintain the confidentiality of the proprietary source code.
7. The Supplier shall ship the goods via insured air freight.
8. The Purchaser shall notify the Vendor of any defects immediately.
9. The Borrower shall repay the principal amount plus accrued interest.
10. The Employer shall provide a safe working environment for all staff.
11. The Consultant shall submit a weekly progress report to the Director.
12. The Company shall indemnify the Director against all legal liabilities.
13. The Receiving Party shall destroy all copies of Confidential Information upon request.
14. The Distributor shall market the Products only within the designated Territory.
15. The Carrier shall be liable for any damage during transit.
16. The Author shall retain the copyright to all preliminary sketches.
17. The Landlord shall maintain the structural integrity of the premises.
18. The Franchisee shall operate the business under the operational manual guidelines.
19. The Insurer shall pay the claim within fourteen business days.
20. The Agent shall act in the best financial interests of the Principal.
21. The Vendor shall warrant that the equipment is free from defects.
22. The Subcontractor shall comply with all local environmental regulations.
23. The Parties shall execute this Agreement in duplicate originals.
24. The Borrower shall maintain a minimum cash balance in the account.
25. The Arbitrator shall issue a final written decision within sixty days.

Category 2: Policy Recommendations and Expectations (“Should”)

26. Board members should review the financial statements before the meeting.
27. Employees should report any potential conflicts of interest to HR.
28. The Committee should meet at least four times per calendar year.
29. Managers should document all verbal warnings given to staff members.
30. The IT department should update the security protocols every quarter.
31. Independent contractors should carry their own professional indemnity insurance.
32. Shareholders should attend the Annual General Meeting in person if possible.
33. The company should strive to reduce its carbon footprint annually.
34. Supervisors should provide constructive feedback during annual performance reviews.
35. The marketing team should align all campaigns with corporate brand guidelines.
36. Staff members should encrypt all emails containing sensitive client data.
37. The advisory board should provide strategic guidance on market expansion.
38. New hires should complete the orientation program within their first week.
39. The accounting team should reconcile all bank accounts on a weekly basis.
40. HR personnel should maintain objective notes during employee grievance interviews.
41. Project teams should conduct a risk assessment before launching new products.
42. Legal counsel should review all external press releases before publication.
43. Trustees should diversify the trust investments to minimize financial risk.
44. The internal auditor should sample transaction records at random intervals.
45. Procurement officers should seek at least three independent vendor quotes.
46. The design team should prioritize user accessibility in the new software interface.
47. Executive officers should model ethical behavior across all corporate operations.
48. The research department should verify data sources before final submission.
49. Customer service agents should respond to inquiries within twenty-four hours.
50. Representatives should dress in professional business attire for client meetings.

Category 3: Conditional and Statutory Frameworks

51. Notice shall be deemed served when delivered to the registered office.
52. This Agreement shall be governed by the laws of England and Wales.
53. Any amendments to this Deed shall be made in writing.
54. The statutory tribunal should consider the financial impact on the applicant.
55. No party shall assign this Lease without prior written consent.
56. The regulations state that the safety valve should be inspected monthly.
57. A director shall vacate their office if they become bankrupt.
58. The court should interpret the clause according to its plain meaning.
59. Time shall be of the essence in respect of all payment dates.
60. The regulatory authority should issue guidance on compliance methods shortly.
61. Neither party shall be liable for delays caused by acts of God.
62. The panel should weigh the evidence before making a final determination.
63. This contract shall bind the parties and their respective successors.
64. The compliance officer should review the statutory filings before submission.
65. The dividend shall be payable only out of corporate profits.
66. The code of practice suggests that employers should offer flexible hours.
67. The internal records shall be open to inspection by shareholders.
68. The liquidator should distribute the assets according to statutory priority.
69. All notices under this clause shall be sent via registered post.
70. The local planning authority should respond to the application within eight weeks.
71. The corporate seal shall be affixed only by order of the Board.
72. The guidelines indicate that companies should maintain a risk register.
73. This power of attorney shall remain valid despite subsequent incapacity.
74. The ombudsman should attempt to resolve the dispute through mediation first.
75. The primary liability shall rest with the principal debtor.

Category 4: Corporate Real Estate, Employment, and Liability

76. The Employee shall not disclose trade secrets after termination.
77. The workplace health policy suggests that employees should take regular breaks.
78. The Tenant shall keep the interior of the property clean.
79. Property inspectors should check the electrical wiring every five years.
80. The Landlord shall return the security deposit within three weeks.
81. Staff should report any structural damage to facility management immediately.
82. The Company shall pay the Employee a monthly vehicle allowance.
83. Workstations should be ergonomically adjusted to prevent workplace strain.
84. The Executive shall not solicit clients of the Company for one year.
85. The staff handbook states that employees should not accept expensive gifts.
86. The Contractor shall remedy any structural defects at their own expense.
87. The project manager should update the client if timelines shift.
88. The Buyer shall accept the property in its current “as-is” condition.
89. Real estate agents should disclose any personal interest in the property.
90. The Seller shall clear all outstanding mortgages before closing the sale.
91. Valuers should use recent comparable sales data for their reports.
92. The Licensee shall display the safety warning signs prominently at the venue.
93. Event organizers should secure public liability insurance before opening doors.
94. The Author shall indemnify the Publisher against claims of plagiarism.
95. Editorial staff should double-check all factual assertions before printing.
96. The Partner shall not engage in any competing business ventures.
97. Business partners should review their equity split every two years.
98. The Customer shall pay all outstanding invoices prior to delivery.
99. Delivery drivers should verify the recipient’s identity before handing over parcels.
100. The Guarantee shall remain enforceable until all debts are fully satisfied.

Conclusion on Using “Shall” vs “Should” in Formal Legal English

Understanding the difference when using “shall” vs “should” in formal legal English is critical for drafting precise, enforceable documents. “Shall” commands an action and creates a binding obligation, while “should” merely guides or recommends. By keeping these distinctions clear—or opting for the modern clarity of “must”—you protect your agreements from ambiguity and minimize the risk of costly legal disputes.

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Disclaimer on Using “Shall” vs “Should” in Formal Legal English

This article provides general information on legal English drafting conventions and terminology. It does not constitute formal legal advice. For specific contract questions or drafting needs, please consult with a qualified attorney in your jurisdiction.

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