In modern English, use will for almost every statement about the future — "I will call you tomorrow," "They will win." Shall has largely faded from everyday use, but it stays alive in first-person questions and suggestions ("Shall I help?", "Shall we go?"), in emphatic or ceremonial declarations ("We shall overcome"), and in traditional legal drafting. If you are ever unsure, will is safe — or use the contraction 'll, which sidesteps the choice entirely.
The traditional rule (and why it barely applies now)
Eighteenth- and nineteenth-century grammarians, and later Henry Fowler in Modern English Usage, laid down a tidy two-part rule for the "pure" future:
- To state a simple, neutral future, use shall with I and we, and will with you, he, she, it, and they.
- To express determination, a command, or a promise, flip it: will with I and we, and shall with the other persons.
So "I shall arrive at noon" was a plain prediction, while "I will arrive at noon" signalled resolve. "You shall not pass" carried the speaker's authority; "you will not pass" was a mere forecast.
The classic illustration is the drowning man. "I shall drown; no one will save me" is a tragic prediction — the speaker expects to die and expects no rescue. Swap the auxiliaries and the meaning turns sinister: "I will drown; no one shall save me" becomes a declaration of suicidal intent — I am determined to drown, and I forbid anyone to stop me. That single pair captures the entire traditional system.
Here is the honest part: this rule was always more an ideal of educated southern-English usage than a description of how people actually spoke. Scots, Irish, and American speakers largely ignored it, and even celebrated prose broke it freely. It is worth knowing so you can read older writing accurately — but it is no longer a rule you must obey.
Modern usage: will has won
Today will serves as the ordinary future auxiliary for every person, in both speech and writing. Shall now sounds formal, old-fashioned, or emphatic, and in American English it is genuinely rare outside legal documents. Two everyday habits have accelerated the shift:
- The contraction 'll (I'll, we'll, they'll) stands in for either word, so speakers rarely have to choose. "I'll see you Monday" commits to nothing about shall versus will.
- Shan't (shall not) survives in British English — "I shan't be long" — but has all but vanished from American speech, where "won't" does the job.
Correct vs incorrect: clear examples
Because will is now standard for the future, it is almost never wrong. The genuine errors cluster around questions and legal wording, where shall and will are not interchangeable.
- ✓ "I will email you the file this afternoon." (standard modern future)
- ✓ "I shall email you the file this afternoon." (correct, just more formal or British)
- ✓ "Shall we order?" (a suggestion — idiomatic)
- ✗ "Will we order?" (this asks someone to predict the future, rather than proposing anything)
- ✓ "Shall I carry that for you?" (an offer)
- ✗ "Will I carry that for you?" (unidiomatic in standard English for an offer)
Shall in questions: its last stronghold
The one place shall is still fully alive — even for people who never use it anywhere else — is first-person questions. "Shall I…?" and "Shall we…?" make offers, suggestions, and requests for direction:
- "Shall I open a window?" (offering to act)
- "Shall we dance?" (proposing that you both act)
- "What shall I tell them?" (asking for direction)
Replace shall with will here and the meaning changes rather than staying the same: "Will we dance?" asks for a prediction about the evening, not an invitation. Americans often dodge shall in this slot with should or a paraphrase: "Should I open a window?" or "Do you want to dance?"
Shall in legal and formal text
Traditional legal drafting uses shall to impose a duty: "The tenant shall pay rent on the first of each month." The trouble is that drafters have used the same word to mean must, may, is entitled to, should, and plain future — sometimes on the same page. That ambiguity has produced real litigation.
The modern plain-language movement — including drafting authorities such as Bryan Garner and the U.S. federal plain-language guidelines — recommends dropping shall almost entirely: use must for a genuine obligation, may for permission, and will or the present tense for everything else. A useful test: if you can replace shall with "has a duty to" and the sentence still makes sense, it is being used correctly; if not, it is muddled.
- Traditional: "The contractor shall complete the work by 1 June."
- Clearer: "The contractor must complete the work by 1 June."
- Misuse: "No person shall be entitled to a refund." (here shall imposes no duty — write "No person is entitled to a refund.")
Tricky cases and exceptions
- Emphatic and ceremonial shall. In elevated or defiant registers, shall conveys solemn inevitability: "We shall overcome," "You shall not pass," "I shall return." Note that the first-person ones express resolve — exactly where strict Fowler demanded will — which shows how loosely the tidy rule ever fit real English.
- Irish and Scottish English. "Will I get the door?" is a perfectly normal offer in Ireland, where other speakers would say "Shall I…?"
- Should and would. The old shall/will split once extended to their past forms — "I should be glad to help" meant "I would be glad to help." That first-person should is now dated and chiefly British; would is standard everywhere.
A memory trick
Forget the tables and remember the drowning man. "I shall drown" is a doomed prediction; "I will drown" is a stubborn choice. Once you feel that will carries the willpower and shall carries the plain forecast, the traditional logic clicks — and for everyday writing you can simply reach for will.
US vs UK: does it matter?
Yes, mildly. British English keeps shall more readily — in "Shall we…?" questions, in shan't, and in formal prose — though even there will is winning. American English treats shall as formal or legalistic and avoids it in speech, preferring will, or should I / do you want me to for offers. In both varieties, the spoken contraction 'll quietly settles most of the question.
