Independent form guide. BrieflyGo is not affiliated with or endorsed by IRS, USCIS, SSA, DOL, or any U.S. government agency. Official forms are sourced from public government websites.
Official form guide
Form 8804-SA: 8804 (Schedule A)
IRS Form 8804 (Schedule A) is used by partnerships with effectively connected taxable income allocable to foreign partners to determine any underpayment penalty. Attach the schedule when Part II, line 1 is $500 or more and the partnership uses an adjusted seasonal or annualized installment method.
Need help with Form 8804-SA?
Open it in the AI Editor for field guidance, checks, and PDF export.
Need help? AI Editor guides you through every field of Form 8804-SA.
Start filling →Form Overview
IRS Form 8804-SA - 8804 (Schedule A)
IRS Form 8804 (Schedule A) is used by partnerships with effectively connected taxable income allocable to foreign partners to determine any underpayment penalty. Attach the schedule when Part II, line 1 is $500 or more and the partnership uses an adjusted seasonal or annualized installment method.
Risk Radar
Scan points- 1Failing to attach Schedule A when Part II line 1 ≥ $500 triggers the penalty.
- 2Not attaching Schedule A to Form 8804 when Part II line 1 is $500 or more.
- 3Omitting to check the required box in Part I before filing.
- 4Failing to check the box on Form 8804 line 8 after completing Schedule A.
- 5Leaving line 6 columns (a‑d) blank or entering payments made after the due date.
Plain English
Schedule A helps a partnership figure out if it owes a penalty for not paying enough estimated tax on foreign partner income. If the partnership uses special installment methods or the tax on line 1 reaches $500, it must fill out the schedule and send it with Form 8804.
Submission Date
- Filing date: 2025-12-08 15:10:37
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
AI co-pilot
Fill it faster. Catch mistakes before you file.
What this form is for
- Use this form when a partnership with effectively connected taxable income allocable to foreign partners must determine the underpayment penalty and Part II, line 1 is $500 or more or the partnership uses the adjusted seasonal or annualized installment methods, or any Part I box is checked.
- Do not use it when the partnership does not have effectively connected taxable income allocable to foreign partners, or when Part II, line 1 is less than $500 and no Part I boxes apply, meaning the IRS will calculate any penalty automatically.
Form selector
Use this form or another form?
Part II, line 1 is $500 or more and using adjusted seasonal installment method
Schedule A must be attached to report the penalty calculation
✓ Verify Part I boxes are checked
Both adjusted seasonal and annualized methods are used
All parts IV through VI of Schedule A must be completed
✓ Confirm both method boxes are selected in Part I
Part I boxes are checked even though no penalty is owed
Schedule A is required to be filed regardless of penalty amount
✓ Ensure at least one Part I box is marked
Deadline or filing window
Not stated in the official source
Checklist
What you need before filling it out
Part I – Reason for filing checkboxes
Indication of method used or safe harbor applicability · Schedule A (Form 8804) Part I
Part II – Line 1 amount
Total Section 1446 tax for the year · Schedule A Part II, line 1
Part III – Line 6 estimated tax payments
Records of estimated tax installments made · Schedule A Part III, line 6
Part VII – Penalty calculation
Underpayment rate from IRC section 6621(a)(2) · Schedule A Part VII
Signature line
Authorized partnership representative signature · Bottom of Schedule A (Form 8804)
Before you submit
- 1Verify that Part I boxes correctly reflect the use of adjusted seasonal or annualized installment methods.
- 2Confirm Part II, line 1 shows $500 or more when filing the schedule.
- 3Enter the total Section 1446 tax for the prior year on Part II, line 2 if the prior-year safe harbor applies.
- 4Record all estimated tax payments on Part III, line 6, including any overpayment credit.
- 5Complete lines 39 through 43 in each column before calculating line 38 as instructed.
- 6Calculate the underpayment amount on line 43 and transfer the result to line 5.
- 7Complete Part VII to compute the penalty using the underpayment rate from section 6621(a)(2).
- 8Sign the schedule in the signature area before attaching it to Form 8804.
How to file this form
- 1Gather partnership’s effectively connected taxable income and Section 1446 tax figures.
- 2Check the appropriate boxes in Part I to indicate the installment method(s) used.
- 3Complete Part II, entering the total Section 1446 tax and any prior-year safe harbor amounts.
- 4Fill out Part III with all estimated tax payments and any overpayment credits.
- 5Calculate the underpayment amounts in columns (a)‑(d) and enter the smaller amount on line 43, then copy to line 5.
- 6Determine the penalty in Part VII using the underpayment rate from section 6621(a)(2).
- 7Sign the Schedule A and attach it to Form 8804.
- 8Mail the completed Form 8804 with attached Schedule A to the IRS address indicated in the instructions.
Known limitations
- 1Partnership does not have to file Schedule A if Part II, line 1 is less than $500 and none of the special installment methods are used — Instructions p.1
- 2Partnership must file Schedule A when Part II, line 1 is $500 or more and the adjusted seasonal installment method is used — Instructions p.1
- 3Partnership must file Schedule A when Part II, line 1 is $500 or more and the annualized income installment method is used — Instructions p.1
- 4Partnership is exempt from the underpayment penalty if the tax shown on line 5f of its 2025 Form 8804 is less than $500 — Instructions p.1
Field map
Compact field-by-field guide
Entity Info
1 items
Name and taxpayer ID of the entity claiming the credit.
Credit Info
1 items
Type of credit or incentive being claimed.
Calculation
2 items
The base amount used to calculate the credit.
Calculated credit amount after applying formulas and limitations.
Certification
1 items
Detailed breakdown supporting the credit calculation.
Signatures
1 items
Sign and date the form.
Almost done reviewing the fields?
Fillable formOpen in Editor->The form is the 20 25 edition; the instructions direct users to the IRS website for the latest information. No specific changes are listed in the source.
What changed or needs a fresh check
- Edition date — confirm the form shows 20 25 revision
- Fee — Not stated in the official source
- Mailing address — Not stated in the official source
- Signature — Not stated in the official source
Quick Facts
Downloads
After you file
- 1Retain a complete copy of the filed Schedule A with the partnership’s tax records.
- 2Keep the Schedule A and related Forms 8804, 8805, and 8813 for at least three years after the filing year.
- 3If the IRS issues a notice of penalty, compare the amount with the figure entered on line 65 of Schedule A.
- 4To correct a mistake, file an amended Form 8804 and attach a revised Schedule A reflecting the correct calculations.
- 5Do not attach Schedule A to Form 8804 when you only use it to compute the penalty amount for line 8 of Form 8804 — Form p.1
Sources
- SRCInstructions p.1 — partnership generally not required to file Schedule A unless exceptions apply.
- SRCInstructions p.1 — must file Schedule A if Part II, line 1 is $500 or more and adjusted seasonal installment method is used.
- SRCInstructions p.1 — must file Schedule A if Part II, line 1 is $500 or more and annualized income installment method is used.
- SRCInstructions p.1 — partnership won’t have to pay penalty if tax shown on line 5f of its 2025 Form 8804 is less than $500.
- SRCInstructions p.2 — payments due on Saturday, Sunday, or legal holiday are considered made on the next business day.
- SRCInstructions p.2 — include on line 6 tax paid by another partnership, Section 1445(a/e) tax, and Section 1446(f)(1) tax.
- SRCInstructions p.3 — extraordinary items of $1 million or more or section 481(a) adjustment must be reported on line 22b.
- SRCForm p.1 — if penalty is calculated, enter amount from line 65 of Schedule A on line 8 of Form 8804 but do not attach Schedule A.
Common confusion points
Do I need to file Schedule A if my partnership owes no penalty?
The instructions state the partnership generally isn’t required to file unless exceptions apply.
→ Verify that Part II, line 1 is under $500 and no special installment method is used.
What happens if the installment due date falls on a weekend?
Payments made on the next business day are treated as timely.
→ Confirm the payment date is the first non‑holiday weekday after the due date — Instructions p.2
How do I report Section 1446 tax paid by another partnership?
Line 6 requires inclusion of tax paid or withheld by another partnership in which you were a partner.
→ Enter the amount on line 6, column (a) through (d) as instructed — Instructions p.2
When must I report extraordinary items on line 22b instead of line 15?
Items of $1 million or more, or a section 481(a) adjustment, must go on line 22b; de‑minimis items you choose to exclude from line 15 also go on line 22b.
→ Review the amount and classification before entering on line 22b — Instructions p.3
Do I attach Schedule A to Form 8804 after calculating the penalty?
The schedule is not attached when you only enter the penalty amount on Form 8804 line 8.
→ Follow the note on the form that says not to attach Schedule A in that case — Form p.1
What if I used the adjusted seasonal installment method but the penalty is zero?
Even with a zero penalty, the schedule must be filed because the method triggers the filing requirement.
→ Check the box for the adjusted seasonal method in Part I and file Schedule A regardless of penalty amount.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
Questions about IRS Form 8804-SA
What is IRS Form 8804-SA used for?
Schedule A helps a partnership figure out if it owes a penalty for not paying enough estimated tax on foreign partner income. If the partnership uses special installment methods or the tax on line 1 reaches $500, it must fill out the schedule and send it with Form 8804.
Who must file IRS Form 8804-SA?
Partnerships that have effectively connected taxable income allocable to foreign partners must file Schedule A when Part II, line 1 is $500 or more and they use the adjusted seasonal or annualized installment method.
What information does IRS Form 8804-SA require?
The schedule collects the reason for filing in Part I, the total Section 1446 tax on Part II line 1, payments on line 6 (columns a‑d), underpayment amounts on line 12, and, if applicable, details in Parts IV, V, and VI for the installment methods.
How do I complete IRS Form 8804-SA?
First, check the appropriate box or boxes in Part I and be sure to check the box on Form 8804 line 8. Attach Schedule A to Form 8804 when Part II line 1 shows $500 or more. Enter payments on line 6 for each due‑date column, calculate any underpayment on line 12, and complete Parts IV, V, and VI as required by the chosen installment method. Finally, sign the schedule before filing.
What happens if IRS Form 8804-SA is filed incorrectly?
If the schedule is not filed when required, the partnership may be subject to the underpayment penalty for estimated Section 1446 tax.
Do I need to file Schedule A if my partnership owes no penalty?
The instructions state the partnership generally isn’t required to file unless exceptions apply. Verify that Part II, line 1 is under $500 and no special installment method is used.
What happens if the installment due date falls on a weekend?
Payments made on the next business day are treated as timely. Confirm the payment date is the first non‑holiday weekday after the due date — Instructions p.2
How do I report Section 1446 tax paid by another partnership?
Line 6 requires inclusion of tax paid or withheld by another partnership in which you were a partner. Enter the amount on line 6, column (a) through (d) as instructed — Instructions p.2
Source transparency
Copyright & Licensing - US Government Forms
BrieflyGo links to and explains official public form sources. We are not a government agency, and this page is for general form guidance, not legal advice.
Understand the agreement before you sign it.
Review risky clauses in plain English, fix the document, and keep it moving toward signature.