Common reasons fieldwork hours get rejected, and how to prevent each one
Fieldwork hours are usually lost for paperwork and timing reasons, not because the work was poor: a monthly form signed after the deadline, a month with no observation, fewer than 20 hours, too little supervision, more group than individual supervision, a supervisor who was not qualified or had no signed contract, hours that were not behavior analytic, or forms that were lost or incomplete. Almost all of them can be caught before the month closes, when there is still time to fix them.
Monthly reasons, and what happens to the month
The handbook's adjustment table says what happens when a monthly requirement is missed. Some misses lose the whole month; others reduce it.
| Problem | What happens to the month | How to prevent it |
|---|---|---|
| Monthly form signed after the last day of the following month | No hours count | Put the signing date in both calendars when the month starts |
| No observation with a client | No hours count | Book the observation early in the month, not in the last week |
| Fewer than 20 hours | No hours count | Check the running total two weeks before month end |
| More than the monthly maximum | Independent hours are removed down to the maximum | Stop logging independent time once you reach it |
| Supervision percentage too low | Independent hours are reduced until the percentage is met | Add supervision before the month closes |
| More group than individual supervision | Group hours are reduced to match individual | Keep at least half of supervision one to one |
| Too few contacts (2022 only) | Hours are prorated by the share of contacts held | Log each meeting as its own entry |
The table is written against the 2022 figures, and concentrated fieldwork cannot be prorated or adjusted at all. For a 2027 month, agree with your supervisor how each adjustment applies before signing.
Reasons that can void more than a month
- Starting too early. Hours only count once you have a qualified supervisor, a signed supervision contract with each supervisor, and, on the coursework pathways, have started a qualifying behavior analytic course that you go on to pass.
- An unqualified supervisor. Supervisors must hold active certification with no current sanctions, meet the supervision continuing education rule, and have completed the 8 hour supervision training before signing your contract. A supervisor certified less than a year also needs monthly consultation from a qualified consulting supervisor.
- A conflict of interest. A supervisor may not be related to you, be your subordinate, be employed by you, or be in another personal or business relationship with you. You may not be related to the client or be their primary caregiver.
- Activities that do not count. Conferences, courses, homework, podcasts, crisis or CPR training, non behavior analytic assessments, billing and role plays that are not client related are all excluded.
- The five year window. Every hour must fall within five continuous years, counted by calendar month.
- Lost, outdated or incomplete forms. A lost monthly form means those hours should not be counted, forms that are not the board's current versions are not accepted, and forms with missing information are denied.
- Missing an audit deadline. If your fieldwork is audited, documents are usually due within 14 days, and a missed deadline makes the fieldwork noncompliant.
- Too little unrestricted work overall. At least 60 percent of your total must be unrestricted activities, checked across all your hours.
The certifying board does not rule on whether a particular activity counts. Your supervisor decides, using the handbook, so ask before you log anything unusual.
Worked example: one month, two adjustments
An October month of supervised fieldwork shows 143 h independent and 7 h supervised, 4 h of it group and 3 h individual, with 80 minutes of observation. The total of 150 h is inside 20 to 160 and observation passes. But group time is more than individual time, and the percentage is 4.67.
- Reduce group to equal individual: supervised becomes 3 h individual plus 3 h group, 6 h.
- Recheck the percentage: 360 of 8,940 minutes is 4.03 percent, still short.
- Reduce independent time until 6 h is 5 percent: 19 x 360 minutes is 114 h.
- The month counts 114 h independent plus 6 h supervised, 120 h, instead of the 150 h worked.
Thirty hours lost that one extra individual hour mid month would have saved. The free monthly checker shows these gaps while the month is still open, and the supervision percentage guide explains the arithmetic.
Common mistakes
- Logging supervised time without noting individual or group, so the monthly split cannot be shown.
- Writing down that an observation happened but not how many minutes. The 2027 rule is minutes; the transition guidance suggests tracking both the count and the duration.
- Leaving the whole review to the final form. The supervisor should review every month's hours before signing its monthly form.
- Keeping forms in one place only. Both you and your supervisor keep copies for at least 7 years.
- Not marking each activity restricted or unrestricted, which leaves the 60 percent share unprovable.
- Assuming a new setting or supervisor starts a new clock. Every counted hour, across every setting, has to fit inside one five year span.
Check your own months
The free monthly checker tests one month's numbers against every rule as you type, with the exact shortfall. The log keeps every session and checks each month for you, privately in your browser.
Frequently asked questions
Can I get hours back from a monthly form signed late?
No. The handbook lists a monthly form not signed by the last day of the following calendar month as making the month's hours ineligible, with no adjustment.
What if I lost a monthly form?
Those hours should not be counted. If your fieldwork is audited and the form is missing, the hours will not be accepted, and you may need to complete more fieldwork.
Who decides whether an activity counts?
Your supervisor, using the acceptable and unacceptable activities in the handbook. The certifying board does not give rulings on individual activities.
How long do I have to answer a fieldwork audit?
The handbook describes a time frame given in the audit email, typically 14 days. Documents sent after the deadline are not reviewed, and no response means the fieldwork is treated as noncompliant.
Sources
Last reviewed 26 September 2026 against:
- Board Certified Behavior Analyst Handbook, Behavior Analyst Certification Board, updated 06/2026, read 25 September 2026. Used for: Supervised Fieldwork Requirements, pages 14 to 25: hours, activities, supervision, documentation, verification forms, adjustments and audits.
- 2027 BCBA Requirements, Behavior Analyst Certification Board, updated 02/2026, read 25 September 2026. Used for: The 2027 overview of fieldwork requirements and the list of 2027 monthly and final forms.
- Guidance for Meeting the BCBA Requirements During the 2027 Transition, Behavior Analyst Certification Board, updated 01/2026, read 26 September 2026. Used for: Meeting both rule sets at once, which forms to keep, and how concentrated hours and the monthly maximum carry across.
- Documenting Fieldwork: Helpful Answers to Your FAQs, Behavior Analyst Certification Board, updated April 2026 for the 2027 requirements, read 25 September 2026. Used for: Correcting a signed monthly form, lost forms, the 1.33 multiplier and which supervisor signs.
- Commonly Asked Questions About BACB Supervised Fieldwork Requirements, Behavior Analyst Certification Board, last updated 17 April 2025, read 25 September 2026. Used for: Restricted and unrestricted activities, observation by video, and who decides whether an activity counts.
This guide is our own summary, not advice about your eligibility. If it disagrees with the current documents, the documents win. Fieldwork Ledger is not affiliated with, endorsed by, or connected to the Behavior Analyst Certification Board or any other certifying body.