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Using NIST CSF 2.0 in a small business, one function at a time

The six functions of the NIST Cybersecurity Framework in plain terms, a starter profile for a 25 to 100 person business and how to turn it into a plan.

Six functions, plain terms

A starter profile to copy

Turn gaps into a plan

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The short answer

The NIST Cybersecurity Framework (CSF) 2.0, released in February 2024, is a free, voluntary way to organize your security into six functions: Govern, Identify, Protect, Detect, Respond and Recover. It does not tell you which products to buy. It gives you a checklist of outcomes, such as “we know what devices we have” or “we can restore critical data”, so you can see where you stand and decide what to fix first.

For a small business, the practical method is to write a short current profile (what you do today) and a target profile (what you want within a year), then work the gaps in order of risk. NIST publishes a Small Business Quick-Start Guide to help, and the starter profile below gets you most of the way.

Why small businesses use it

Version 2.0 was written for organizations of every size, not just critical infrastructure, and NIST added quick-start guides for small businesses alongside it. Owners use it for three reasons: it gives a common language with insurers, clients and IT providers; it turns “are we secure?” into specific questions; and it maps to other frameworks, such as the CIS Controls and NIST SP 800-171, so work is not wasted if a stricter requirement comes later.

It is not a certification. Nobody “passes” CSF. If someone claims to certify you against it, ask what they mean.

The six functions in plain terms

Govern

Who owns cybersecurity, what the rules are, how risk decisions are made and how suppliers are managed. New in 2.0 and placed at the center.

Identify

Know what you have: devices, software, data, accounts and vendors, and which of them matter most.

Protect

Keep bad things from happening: MFA, access control, updates, encryption, training and backups.

Detect

Notice when something goes wrong: alerts, logs, endpoint protection and someone who looks at them.

Respond

Act when an incident happens: a plan, roles, communication and containment.

Recover

Get back to normal: restore systems and data, and learn from what happened.

The order matters less than the balance. Many small businesses spend everything on Protect and nothing on Detect, Respond or Recover, so a single breach that gets through causes days of downtime.

A starter profile for a 25 to 100 person business

Copy this list. For each line, write today’s status (yes, partly, no, don’t know) and an owner.

Govern

  • A named person owns cybersecurity and reports to the owner at least yearly
  • Written policies for acceptable use, passwords and MFA, and remote work
  • Legal and contract obligations listed (insurance, client contracts, industry rules)
  • Key vendors listed with what data each holds

Identify

  • Inventory of computers, phones, servers and network gear
  • Inventory of cloud apps and who administers each
  • Sensitive data located: where client, employee and financial data lives
  • A yearly risk review of the top threats, such as phishing, ransomware and payment fraud

Protect

  • MFA on email, remote access, banking and admin accounts
  • Accounts removed the day someone leaves; access reviewed quarterly
  • Automatic updates and endpoint protection on every device
  • Laptops and phones encrypted
  • Email filtering and staff phishing training
  • Backups with at least one copy offline or immutable

Detect

  • Alerts from endpoint protection and email security reach a person
  • Suspicious sign-in alerts turned on in Microsoft 365 or Google Workspace
  • Staff know how to report something odd, quickly

Respond

  • A short written incident response plan with phone numbers
  • Insurer and bank contact details where you can find them offline

Recover

  • Restores tested at least twice a year
  • Recovery order agreed: which systems come back first
  • A review after every incident or near miss

Want someone to fill in your current profile for you? Our free Technology Health Assessment takes about 30 minutes of data collection. The next day you get a plain-language report rating your IT operations, cybersecurity, backups and business continuity as controlled, needs attention, significant exposure or unknown, with a short list of next steps in order. It is yours to keep, with no obligation. Book your assessment.

Turning the profile into a plan

  1. Rate each gap by impact. Missing MFA on email or untested backups are high-impact, low-cost fixes. Do those first.
  2. Group work into quarters. Quarter one: MFA, updates, backups. Quarter two: inventory, offboarding, policies. Quarter three: detection and the incident plan. Quarter four: testing and review.
  3. Assign owners and dates. Each line gets a person, internal or your IT provider.
  4. Pick a tier honestly. CSF tiers run from Partial (ad hoc) through Risk Informed and Repeatable to Adaptive. Most small businesses start at Partial or Risk Informed; Repeatable is a realistic target.
  5. Review every year. Update both profiles and report progress to the owner.

A worked example

Take a 40-person engineering firm on Microsoft 365 with a file server, a part-time office manager handling IT and an outside vendor for break-fix work. Its first current profile might read like this:

  • Govern: nobody formally owns security; no written policies; the cyber-insurance application was filled in from memory.
  • Identify: no device list; three former employees still have active accounts.
  • Protect: MFA on email for some staff; laptops not encrypted; backups run nightly but nobody has restored from them.
  • Detect: antivirus installed, but alerts go to an unmonitored mailbox.
  • Respond and Recover: no plan; the bank’s fraud number is not written down anywhere.

The target profile for year one is modest: one owner named, MFA for everyone, leavers removed the same day, laptops encrypted, alerts monitored, a two-page incident plan and a tested restore every six months. None of this needs new software in most Microsoft 365 tenants, only configuration and routine. That is the point of the framework: it shows that the biggest gains are often process, not purchases.

Mistakes to avoid

  • Treating CSF as a document project and never changing a setting
  • Rating everything “partly” so no gap stands out
  • Skipping Govern because it sounds like paperwork; without an owner nothing else sticks
  • Leaving out cloud apps and vendors, where most data now lives

CSF compared with other frameworks

CSF describes outcomes. The CIS Controls describe specific technical safeguards and are often used to implement CSF’s Protect and Detect outcomes. NIST SP 800-171 is a mandatory control set for defense contractors handling CUI. HIPAA and the FTC Safeguards Rule are legal requirements for specific industries. A business can use CSF as the umbrella and plug in whichever specific requirements apply.

Most of the Protect and Recover outcomes above are part of our cybersecurity services: MFA, access reviews, same-day removal of leavers, endpoint protection, updates, encryption, email security, monitored backups with tested restores and a written recovery plan. If you are on Microsoft 365, our Microsoft 365 security settings guide covers many Protect items in detail.

Keep reading

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Questions we hear

What are the six functions of NIST CSF 2.0?

Govern, Identify, Protect, Detect, Respond and Recover. Govern was added in version 2.0, released in February 2024, to cover ownership, policy, risk decisions and supplier management.

Is the NIST Cybersecurity Framework required for small businesses?

No. It is voluntary for most private businesses. Some contracts, insurers or regulators reference it, so check your specific obligations.

Can a business be NIST CSF certified?

No official CSF certification exists. Businesses use it to assess and improve their security and to describe their program to clients and insurers.

Where should a small business start with NIST CSF?

Write a current and target profile using a simple checklist, then fix high-impact gaps first, such as MFA on email, endpoint protection and tested backups. NIST’s Small Business Quick-Start Guide helps.

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