The Combined Federal/State Filing program lets the IRS forward your 1099 data to participating states, and on paper that covers 33 jurisdictions. In practice the coverage is far narrower: many of those states still require a separate direct filing for withholding reconciliation, for 1099-K, or simply because their own revenue department does not honor the program the way the IRS list implies. Nine states have no income tax and need nothing at all, but the other forty-two have some state-level obligation for at least some forms. The safe approach is to treat CF/SF as a convenience that reduces state work in about half the participating states, never as a guarantee that the state side is finished.
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The Comforting Myth About Combined Federal/State Filing
The single most expensive misunderstanding in 1099 compliance is the belief that filing federally also files with the states. It feels true, the IRS program is real, and the marketing around it encourages the assumption. But the Combined Federal/State Filing program does much less than its name suggests, and the gap is exactly where penalties live.
Combined Federal/State Filing, almost always shortened to CF/SF, is an IRS program that forwards the information-return data you already file federally to the revenue departments of participating states. When it works, you file once with the IRS and the state receives a copy without any further action from you. The catch is what CF/SF was never designed to do, because the program moves only the information return itself and nothing that sits around it. It does not satisfy a state's separate withholding reconciliation, which is the return a state uses to match the tax you withheld against the payer's account. It does not produce the state-specific transmittal or annual report many states demand alongside the 1099 data, so that obligation stays open even after the data arrives. And it has no effect on a state's independent 1099-K mandate, because that form is excluded from the program entirely. The data reaches the state, but the rest of your state filing duties do not travel with it.
There is a second, quieter problem. The IRS list of CF/SF participants and the position of the states' own revenue departments do not always agree. Three states the IRS currently lists as participants explicitly disclaim the program in their own guidance: Oregon describes its listing as inadvertent, Rhode Island states plainly that it does not participate, and Maine instructs filers not to use the combined federal/state program at all. For those states the IRS-side flag is real but the practical effect is zero, and you must file directly regardless. Of the thirty-three states the IRS lists, only about sixteen actually let CF/SF reduce your direct-filing burden in a meaningful way. The other roughly seventeen require a direct state filing in some or all 1099 scenarios anyway.
The CF/SF program, its participating-state list, and the form types it covers are defined in IRS Publication 1220, Part A. Publication 1220 remains the authoritative reference for the field layouts and the combined-program state list even under IRIS. Read it directly at irs.gov/pub/irs-pdf/p1220.pdf, and always reconcile it against each state revenue department's own current guidance, because the two can disagree.
Every State Falls Into One of Four Buckets
Once you stop thinking of states as simply "CF/SF or not" and start sorting them by what they actually require, the fifty-one jurisdictions collapse into a small number of patterns. The first and easiest bucket is the nine states with no income tax, which never require any 1099 state filing. The second is the states that require a direct filing in essentially every case, whether or not they appear on the IRS CF/SF list. The third is a set of states where 1099-NEC is always direct but the other forms ride on a withholding trigger. The fourth, and largest among participants, is the withholding-trigger states, where CF/SF genuinely satisfies the non-withholding forms and you only file directly when state tax was withheld.
| Bucket | Count | What it means for you |
|---|---|---|
| No state income tax | 9 | AK, FL, NH, NV, SD, TN, TX, WA, WY — no 1099 state filing, ever |
| Direct-file always | 20 | A direct state filing is required regardless of CF/SF (includes the 11 always-direct CF/SF states plus the 9 non-CF/SF income-tax states) |
| 1099-NEC always direct | 4 | MI, NE, OK, ID — NEC always direct; other forms only when state tax was withheld |
| Withholding-trigger | 16 | CF/SF satisfies the non-withholding forms; file directly only when state tax was withheld |
| Narrow / special case | 2 | DE accepts only MISC, NEC and R; HI uses CF/SF for e-filers with a paper fallback |
The number that matters most is in the highlighted row. Counting the eleven CF/SF-listed states that require direct filing anyway together with the nine income-tax states the IRS does not include in CF/SF at all, twenty jurisdictions need a direct submission as a baseline rather than an exception. Add the four NEC-always states and the sixteen withholding-trigger states, and forty-two of the fifty-one jurisdictions impose a state obligation for at least some forms. Only the nine no-income-tax states let you walk away after the federal filing.
The States That Always Need a Direct Filing
The most dangerous states are the ones that appear on the IRS CF/SF list, lull you into thinking the program covers them, and then require a direct filing anyway. Maryland states outright that it does not process CF/SF 1099s. The District of Columbia says that approved CF/SF status does not satisfy its requirement. Indiana, Ohio, Pennsylvania, Mississippi, Massachusetts and New Jersey all require the data to be submitted directly to the state even after the IRS has forwarded it. Maine and Rhode Island, as noted earlier, reject the program in their own words, and Oregon treats its CF/SF listing as a mistake. Whatever the IRS list says, all eleven of these states behave as direct-file states.
Layered on top of those are nine states with an income tax that the IRS does not include in CF/SF at all: New York, Illinois, Iowa, Kentucky, Missouri, Utah, Virginia, Vermont and West Virginia. Because no federal forwarding exists for them, a direct state filing is the only option whenever an obligation arises. Two of these behave very differently from the rest and deserve their own warning. New York has no general annual 1099 channel; it captures payee data through the quarterly NYS-45 return when New York tax was withheld and through a standalone 1099-K obligation under Tax Law §1703, which means routine 1099-NEC or 1099-MISC with no New York withholding has no New York filing at all. Illinois is similar in spirit, mandating direct filing only for 1099-K while treating every other 1099 as voluntary, with withholding reconciled separately on the quarterly IL-941.
Several direct-file states move their due date off the familiar January 31 line, and a requirement you satisfied on time federally can still be late at the state. Iowa and New Jersey both push the 1099 deadline to February 15. Idaho splits its calendar, holding W-2 at January 31 but giving 1099 forms until February 28. Oklahoma keeps NEC at January 31 but extends other 1099s to March 31. Work each state's date backward from your filing plan rather than assuming the federal calendar carries over.
Withholding-Trigger States: When CF/SF Actually Helps
In the sixteen withholding-trigger states, CF/SF does the job it advertises for most of your volume. For these states the rule is consistent and reassuring: if no state income tax was withheld on a form, CF/SF satisfies the state and you file nothing extra; if state tax was withheld, you owe a direct filing so the state can reconcile that withholding against the employer's or payer's account. Colorado puts the cleanest version of this rule in writing, requiring direct filing only when Colorado tax was withheld. California, Arizona, New Mexico, Wisconsin, Minnesota, Kansas, North Dakota, Montana, North Carolina, South Carolina, Georgia, Alabama, Arkansas, Louisiana and Connecticut all follow the same shape with their own local wrinkles.
The wrinkles are where careful reading pays off. Arkansas adds an unusual trigger, requiring a direct filing not only on withholding but also when payments to a recipient reach $2,500, even with no tax withheld. Several of these states attach a state-specific reconciliation form to the direct filing rather than accepting the 1099 data on its own — Arizona expects the A1-R, Wisconsin the WT-7, North Carolina the NC-3, and so on — and missing the reconciliation form is itself a failure even when the 1099 data arrived. The pattern still favors you: in a typical year, most of your forms carry no state withholding, so CF/SF quietly clears them and your direct work shrinks to the withheld subset. But "most" is not "all," and the withheld forms are precisely the ones a state will notice if they are missing.
1099-K Is the Exception That Breaks the Rules
If there is one form that refuses to play by the bucket logic, it is the 1099-K. Form 1099-K is excluded from CF/SF entirely, which means the combined program never forwards it to any state on your behalf. Wherever a state wants 1099-K data, you must file it directly, full stop. On top of that exclusion, a growing list of states have built their own independent 1099-K mandates that apply regardless of withholding and regardless of CF/SF.
The states with an independent 1099-K obligation each set their own trigger. California requires it for app-based driver payments at a $600 threshold. Georgia mandates it under SB 183. Massachusetts and Virginia impose a $600 third-party-settlement threshold. Connecticut requires every 1099-K filed directly. The District of Columbia, Maryland and New York all carry their own 1099-K rules as well, with New York's resting on Tax Law §1703. The practical takeaway is simple to state and easy to forget: a 1099-K is always a direct-state question, never a CF/SF one, so route it to the state's own channel from the start.
Even though 1099-K never rides CF/SF to a state, it is one of the form types the IRS schema will accept with a CF/SF election set, alongside 1099-B, DIV, G, INT, MISC, NEC, OID, PATR, R and 5498 (business rule S1H003_001). That makes it easy to set the federal combined-program flag on a 1099-K and assume the state is covered. It is not. The flag governs what the IRS forwards under the program; the state's own 1099-K mandate is a separate filing the program does not touch.
How the CF/SF Election Looks Inside an IRIS Filing
When you file through the IRS Information Returns Intake System, the combined program is not a checkbox you tick once for the whole batch — it is encoded into the submission itself, and the IRIS business rules enforce it strictly. There are two pieces. At the submission-header level, the CFSFElectionInd indicator must be set to "1" to declare that this transmission participates in the combined program. At the individual-form level, each return that should be forwarded carries a CFSFElectionStateCd naming the recipient's state.
| Rule ID | What it checks | Severity |
|---|---|---|
S1H002 | If CFSFElectionInd is "1", the TCC must be enrolled in the CF/SF program | Report Error |
SHAREDIRFORM019_002 | CFSFElectionStateCd must be one of the 33 participating state codes | Report Error |
SHAREDIRFORM020 | If a form carries CFSFElectionStateCd, the header CFSFElectionInd must equal "1" | Report Error |
SHAREDIRFORM022 | If CFSFElectionStateCd is present, at least one TotalByStateGrp must be present | Report Error |
The relationship the rules enforce is the part filers trip over. Rule SHAREDIRFORM020 means you cannot elect CF/SF for an individual form without also flipping the header indicator on; the two settings have to agree. Rule SHAREDIRFORM019_002 restricts the state code to the IRS-recognized participants, which is why Oregon, Rhode Island and Maine still appear as valid codes here even though their own departments disclaim the program — the schema validates against the IRS list, not against operational reality, so you set the federal flag per the IRS and handle the actual state filing separately. And rule SHAREDIRFORM022 ties the election to the presence of a state-totals group, so an election with no underlying state amounts is incomplete by definition.
Common Rejection Reasons (and How to Avoid Them)
State filing fails in a handful of predictable ways, and most of them come from treating the combined program as more complete than it is. These are the ones that bite most often, ordered by how frequently they cause a problem.
Cause: you set the federal combined-program flag, the IRS accepted the transmission, and you assumed the participating state was covered — but the state requires a separate direct filing for withholding reconciliation, for 1099-K, or because it does not honor CF/SF at all. Fix: route each form through the four-bucket test before you file. Confirm whether the state is no-tax, always-direct, NEC-always, or withholding-trigger, and file directly wherever the bucket says you must.
Cause: a recipient's state code is not on the IRS participating list, so the form carries a CFSFElectionStateCd the schema does not recognize and rule SHAREDIRFORM019_002 flags it. Fix: only set CFSFElectionStateCd for the 33 IRS-listed states, and send everything else — New York, Illinois, Utah and the rest — through the state's own direct channel.
Cause: an individual form sets CFSFElectionStateCd but the submission header leaves CFSFElectionInd unset, so rule SHAREDIRFORM020 rejects the combination. Fix: set the header indicator to "1" whenever any form in the transmission elects a CF/SF state, so the batch-level declaration and the form-level election agree.
Cause: a form elects a CF/SF state but the submission contains no TotalByStateGrp, leaving the election with nothing to forward, which rule SHAREDIRFORM022 treats as missing data. Fix: populate the state-totals group whenever you elect CF/SF, so each electing state has the corresponding totals the program needs.
Cause: the 1099 data reached the state correctly, but the state also requires its own annual transmittal or reconciliation form — such as Arizona's A1-R, Wisconsin's WT-7, or North Carolina's NC-3 — which was never filed. Fix: treat the reconciliation form as part of the direct filing, not an optional extra, and submit it through the state's portal alongside the 1099 records.
Let the Routing Happen Automatically
Working the four-bucket test by hand across dozens of recipients and a mix of form types is exactly the kind of repetitive judgment that software handles well and tired humans handle badly. The point of a filing platform here is not to replace your understanding of the rules but to apply them consistently at scale, so the right forms go to CF/SF and the rest are routed to the right state on the right date.
Per-form routing
Every form is evaluated against the state, form type and withholding to decide CF/SF versus direct filing.
CF/SF set correctly
The federal combined-program flag and state code are emitted to pass the IRIS rules, with state totals attached.
State deadlines tracked
The off-calendar dates — Iowa's Feb 15, Oklahoma's Mar 31 — are tracked per state, not assumed from the federal line.
The federal flag and the direct-state filing handled as two separate jobs — because that is what they are.
Frequently Asked Questions
Does filing my 1099s with the IRS also file them with the states?
Which states have no 1099 filing requirement at all?
What is the difference between CF/SF and direct state filing?
How many CF/SF states actually require direct filing anyway?
Why do Oregon, Rhode Island and Maine appear on the IRS CF/SF list but not honor it?
Is 1099-K covered by CF/SF?
When does a withholding-trigger state require a direct filing?
Are all state 1099 deadlines January 31?
What does CFSFElectionStateCd do on an IRIS filing?
Do I need to track all of this myself if I file through e1099f?
Does CF/SF cover state withholding reconciliation?
Not tax advice. This is general information about IRS and state filing procedures and may change as the IRS and individual state revenue departments update their programs. The published IRS publications and each state's own guidance are authoritative; consult a tax professional for your specific situation.