Diligence vs Due Diligence Quiz: Test Yourself
Five quick questions on diligence vs due diligence. Pick an answer to get instant feedback.
Flip Cards: Quick Review
Hover over a card, or tap it on mobile, to see the meaning.
Careful, persistent effort.
“Her diligence earned her a promotion.”
A careful check of facts and risks before a deal or decision.
“They completed due diligence before buying.”
Adjective: hardworking and careful.
“A diligent student checks every answer.”
Not a word. A misspelling of diligence.
Write “diligence” with a single l after the first i.
People mix up diligence vs due diligence because one is clearly built from the other. The shorter word describes how you work, and the longer phrase names a specific kind of checking. Using one when you mean the other can make a sentence sound off, especially in business writing.
| Term | Meaning | Part of speech / Category | Example sentence |
|---|---|---|---|
| Diligence | Careful, steady effort and attention to detail | Noun; everyday, character or work quality | She worked with diligence to finish the report. |
| Due diligence | A careful investigation or review done before a deal or decision, or the reasonable care a person is expected to take | Noun phrase; business and legal term | The buyer completed due diligence on the company before signing. |
| Dilligence | No standard meaning; a misspelling of diligence | Misspelling (not a standard word) | Avoid. Write “diligence” instead. |
What does diligence mean?
Diligence means careful, persistent effort: working steadily and paying close attention to what you are doing.
It describes a quality of a person or their work. You show diligence by double-checking figures, finishing tasks properly and not cutting corners. The related adjective is diligent, as in a diligent worker, and the opposite is carelessness or negligence. The word comes from the Latin diligentia, from a verb meaning to value or esteem.
What does due diligence mean?
Due diligence is the careful research and checking you do before making a deal, purchase or other significant decision.
In business, it often means reviewing a company’s finances, contracts and legal risks before buying it or investing in it. In everyday life, it can mean checking a used car’s history, reading a lease or researching a contractor before you sign. In law, the phrase also refers to the level of reasonable care a person or company is expected to take. Because the phrase is also a legal and professional term, its exact meaning can vary by context.
What does “due” mean in due diligence?
In this phrase, due means proper, appropriate or owed. Due diligence is the diligence you are expected to put in before acting.
The same sense of due appears in phrases such as “due care” and “in due course.” It does not mean “scheduled to arrive,” as in “the train is due.” Think of it as the effort that is owed when the stakes are high.
What is the difference between diligence vs due diligence?
Diligence is a general quality of careful effort, while due diligence is a specific act of checking before a decision. You can show diligence in anything you do, but you perform due diligence on something you are about to commit to.
- Diligence (quality): His diligence made him the most reliable person on the team.
- Diligence (effort): She completed the audit with great diligence.
- Due diligence (process): The investors ran due diligence before putting in any money.
- Due diligence (personal): Do your due diligence before you rent that apartment.
Is it “due diligence” or “do diligence”?
The standard phrase is due diligence. “Do diligence” is a common mistake based on the sound of the words.
The mix-up is easy because you do your due diligence, which puts the words do and due close together. Remember that “due” is the adjective that goes before the noun, and “do” is the verb that goes before the whole phrase: you do your due diligence.
How can you remember which one to use?
If you are describing someone’s careful effort, use diligence. If you are describing the checking before a deal or decision, use due diligence. The memory tricks below add two more shortcuts.
Common mistakes with diligence vs due diligence
- ✗ We need to do our dilligence before signing the contract.
✓ We need to do our due diligence before signing the contract. - ✗ She did her do diligence on the property.
✓ She did her due diligence on the property. - ✗ Thanks to his due diligence in class, he never missed an assignment.
✓ Thanks to his diligence in class, he never missed an assignment. - ✗ Dilligence is a key trait of good employees.
✓ Diligence is a key trait of good employees. - ✗ Due diligence just means working hard.
✓ Due diligence means taking reasonable steps to check facts and risks before a decision.
Memory tricks for diligence vs due diligence
- Due means owed. Due diligence is the checking you owe before a big decision.
- Diligence is daily; due diligence is a deal. One is a habit of working carefully, the other is a one-time check before committing.
- One l, two i’s. Spell it d-i-l-i-g-e-n-c-e. If you wrote a double l, remove one.
Diligence vs due diligence FAQ
Is diligence the same as due diligence?
No. Diligence is careful, steady effort in general. Due diligence is a specific careful investigation done before a deal or decision.
What is due diligence in business?
In business, due diligence is the careful review of a company’s finances, contracts and risks before buying it, investing in it or signing a major deal.
Is it due diligence or do diligence?
It is due diligence. Do diligence is a common mistake. You can say you do your due diligence, which uses both words correctly.
How do you spell diligence?
Diligence is spelled d-i-l-i-g-e-n-c-e, with one l after each i. Dilligence with a double l is a misspelling.
Is due diligence a legal term?
Yes, it is used in legal and business settings to describe reasonable care or a careful investigation. Its exact meaning can vary by context, so check the contract or law that applies.
Conclusion
The diligence vs due diligence difference is simple: diligence is careful, steady effort, and due diligence is the careful checking you do before a deal or decision. Spell diligence with a single l, and remember that you do your due diligence, not “do diligence.” Share this with someone who mixes these up.