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GougeProof

Data changes and corrections

What has changed in the rules behind the calculator, and every correction to the data. The rules begin on Oct 1, 2026: nothing earlier is loaded.

By · Data checked Nov 11, 2026 · Page changed Nov 11, 2026

Corrections

A wrong row is never deleted or quietly edited. We add a row with the right figure, mark the wrong one as replaced by it, and list both here. The dataset keeps the replaced row, with the ID of the one that corrects it.

No row has been corrected so far.

Dated changes to the rules

Each line is a change in the rules of one of the 51 states the calculator works from, or something we are watching for, with the date and the row it rests on. Newest first.

  1. Jan 1, 2037 · Washington: Fees: a new version takes effect.

    app.leg.wa.gov · checked Oct 3, 2026

  2. Jan 1, 2031 · Hawaii: Watching: The 0.5% county surcharge on GET ends 2030-12-31 unless extended; the most a dealer may pass on would fall from 4.712%, The Legislature or the counties may extend it before then.

    data.capitol.hawaii.gov · checked Oct 3, 2026

  3. Jan 1, 2030 · Louisiana: Tax lines: a new version takes effect.

    legis.la.gov · checked Oct 3, 2026

  4. Jan 1, 2030 · Louisiana: Watching: The state rate falls from 5% to 4.75% unless the Legislature extends the temporary 0.55%, 2030-01-01 under R.S. 47:321.1; the 4.75% is already loaded from that date.

    legis.la.gov · checked Oct 3, 2026

  5. Jan 1, 2029 · Idaho: Watching: Ada County votes on 2026-11-03 on extending the Ada County Highway District’s registration fee to 2046 at the current rates, No change in the amounts either way before 2029-01-01; if it fails, the $24 to $40 line ends after 2028-12-31 unless the district tries again in 2028.

    achdidaho.org · checked Oct 3, 2026

  6. Jan 1, 2029 · Michigan: What is taxed: a new version takes effect.

    legislature.mi.gov · checked Oct 3, 2026

  7. Jan 1, 2029 · Nebraska: Watching: Multi-year registration on a DMV date, and one plate instead of two with new plates from 2029, On or before 2029-01-01; the plate fee may change with the 2029 plates.

    nebraskalegislature.gov · checked Oct 3, 2026

  8. Jan 1, 2029 · New Mexico: Fees: a new version takes effect.

    nmonesource.com · checked Oct 3, 2026

  9. Jan 1, 2029 · Washington: Fees: a new version takes effect.

    app.leg.wa.gov · checked Oct 3, 2026

  10. Jan 1, 2029 · Washington: Watching: Sound Transit’s 0.3% part of the RTA tax ends when its 1999 bonds are repaid; the 0.8% left then uses the 2006 schedule (85% of MSRP). Case A’s RTA tax would be about $213 instead of $344, Expected at the end of 2028; the statute ties it to the year the bonds are repaid.

    soundtransit.org · checked Oct 3, 2026

  11. Jul 1, 2028 · Montana: Watching: The title fee drops from $12 to $7 on 2028-07-01, MCA 61-3-203 as amended.

    mca.legmt.gov · checked Oct 3, 2026

  12. Jul 1, 2028 · New Jersey: Fees: a new version takes effect.

    nj.gov · checked Oct 3, 2026

  13. Jul 1, 2028 · Washington: Tax lines: a new version takes effect.

    dor.wa.gov · checked Oct 3, 2026

  14. Apr 1, 2028 · New York: Fees: a new version takes effect.

    nysenate.gov · checked Oct 3, 2026

  15. Jan 1, 2028 · Arizona: Watching: Phoenix’s single-item threshold ($14,338) is re-indexed, Every two years; next on 2028-01-01, announced in a Phoenix tax bulletin.

    phoenix.gov · checked Oct 3, 2026

  16. Jan 1, 2028 · Michigan: What is taxed: a new version takes effect.

    legislature.mi.gov · checked Oct 3, 2026

  17. Jan 1, 2028 · New Mexico: Fees: a new version takes effect.

    nmonesource.com · checked Oct 3, 2026

  18. Jan 1, 2028 · New York: Fees: a new version takes effect.

    nysenate.gov · checked Oct 3, 2026

  19. Sep 1, 2027 · Colorado: Fees: a new version takes effect.

    olls.info · checked Oct 3, 2026

  20. Jul 15, 2027 · West Virginia: Watching: A yearly cost-of-living step in the doc-fee figure, which the Dealer Advisory Board recommended from July 1, 2025, Each July 1 if adopted; the board meets in May. Neither the step nor any amount has been published.

    apps.sos.wv.gov · checked Oct 3, 2026

  21. Jul 1, 2027 · Alabama: Fees: a new version takes effect.

    alison.legislature.state.al.us · checked Oct 3, 2026

  22. Jul 1, 2027 · Alabama: Watching: The electric and plug-in hybrid fees rise $3 every fourth year from July 1, 2023; they fall to $150 and $75 once electric and plug-in cars pass 4% of registrations, $206 and $106 from July 1, 2027.

    alison.legislature.state.al.us · checked Oct 3, 2026

  23. Jul 1, 2027 · Connecticut: Watching: The towns’ motor vehicle mill rates for bills on the October 1, 2026 grand list (fiscal 2028), Set by each town in spring 2027 and published by OPM; until then the estimate uses each town’s latest rate.

    cga.ct.gov · checked Oct 3, 2026

  24. Jul 1, 2027 · Georgia: Registration term: a new version takes effect.

    law.justia.com · checked Oct 2, 2026

  25. Jul 1, 2027 · Iowa: Watching: A bill to strike the $180 documentary fee cap (and rename the charge) was introduced in 2025 and did not pass; the next session starts in 2027, No change was scheduled on 2026-10-03; the fee amounts, the 5% rate and the cap are set in statute.

    legis.iowa.gov · checked Oct 3, 2026

  26. Jul 1, 2027 · Minnesota: Fees: a new version takes effect.

    revisor.mn.gov · checked Oct 3, 2026

  27. Jul 1, 2027 · Mississippi: Watching: The Legislative Tag Credit for fiscal year 2028, which the tag takes off, Set by May 1, 2027, in force from July 1, 2027.

    codes.findlaw.com · checked Oct 3, 2026

  28. Jul 1, 2027 · Mississippi: Watching: The Department of Revenue’s motor vehicle assessment schedule for fiscal year 2028, Adopted by June 15, 2027.

    sos.ms.gov · checked Oct 3, 2026

  29. Jul 1, 2027 · Montana: Watching: The 2027 legislative session may change the registration fees; a county may adopt or change its option tax by a vote, New laws usually take effect 2027-07-01 or 2027-10-01.

    mca.legmt.gov · checked Oct 3, 2026

  30. Jul 1, 2027 · Nevada: Watching: The Legislature’s 2027 session may change the GST, county option taxes or the doc-fee rule, Convenes 2027-02-01; new laws usually take effect 2027-07-01 or 2027-10-01.

    leg.state.nv.us · checked Oct 3, 2026

  31. Jul 1, 2027 · New Hampshire: Watching: The next state budget and the inspection court case may change the state fees or restart inspections, No change was scheduled on 2026-10-03; fees are set in statute with no indexing.

    gc.nh.gov · checked Oct 3, 2026

  32. Jul 1, 2027 · New Jersey: Fees: a new version takes effect.

    nj.gov · checked Oct 3, 2026

  33. Jul 1, 2027 · Oklahoma: Watching: Service Oklahoma or the Tax Commission may say how the trade-in and a manufacturer rebate are treated now that the excise is on the actual sales price (from 2026-07-01), No guidance had been published by 2026-10-15; the Commission’s rule 710:60-7-1 still says no trade-in credit.

    oklahoma.gov · checked Oct 3, 2026

  34. Jul 1, 2027 · Oregon: Watching: Electric cars move to the road usage charge: an $86 two-year registration, plus a flat fee or a per-mile charge, at renewal for used electric cars from July 1, 2027, for new ones from January 1, 2028, per DMV.

    oregon.gov · checked Oct 3, 2026

  35. Jul 1, 2027 · South Dakota: Tax lines: a new version takes effect.

    sdlegislature.gov · checked Oct 3, 2026

  36. Jul 1, 2027 · Washington: Tax lines: a new version takes effect.

    dor.wa.gov · checked Oct 3, 2026

  37. Jul 1, 2027 · Wyoming: Watching: The statewide electronic lien and title system starts; its vendors may charge a fee for each transaction, From 2027-07-01; the statute sets no amount.

    wyoleg.gov · checked Oct 3, 2026

  38. Apr 30, 2027 · New Mexico: Watching: The 2027 legislative session (January to March) may change the excise, the registration fees or the transaction fees, New Mexico laws usually take effect July 1, or 90 days after the session ends; no change to the 4% was pending on 2026-10-03.

    nmonesource.com · checked Oct 3, 2026

  39. Apr 1, 2027 · Arizona: Watching: Maricopa County’s 0.2% jail facilities tax ends unless voters extend it (0.7% would become 0.5%), About 2027-04-01 if the 2026-11-03 ballot question fails; ADOR’s rate table will show it.

    azleg.gov · checked Oct 3, 2026

  40. Mar 1, 2027 · Minnesota: Watching: Dakota, Isanti and Mower counties’ wheelage tax rises from $10 to $20 for registration periods beginning January 1, 2027 (in the table from that day); Driver and Vehicle Services posts its 2027 list, The 2027 list should show the three at $20 and the other counties unchanged.

    dps.mn.gov · checked Oct 3, 2026

  41. Feb 15, 2027 · New Mexico: Watching: The state gross receipts tax rate may rise from 4.875% to 5.125% if the year’s receipts fall below 95% of the year before, The Department of Finance and Administration decides by February 1 each year; a new rate starts the next July 1, in the schedule the doc fee’s tax reads.

    nmonesource.com · checked Oct 3, 2026

  42. Feb 1, 2027 · Kansas: Watching: The Property Valuation Division certifies the 2028 motor vehicle levies about February 1, 2027; KDOR updates its MSRP classes each model year, The 2028 levies in pvd2028mvlevy.pdf.

    ksrevenue.gov · checked Oct 3, 2026

  43. Feb 1, 2027 · Missouri: Watching: Dealers start collecting the motor vehicle sales tax, and tax must be paid before a temporary plate is issued, in February 2027, per the Department of Revenue’s FUSION dealer newsletter.

    revisor.mo.gov · checked Oct 2, 2026

  44. Jan 31, 2027 · Alaska: Watching: A proposed state sales and use tax (HB 284 / SB 227: 4% April to September, 2% October to March), to be paid at vehicle registration, Not law; it takes effect only if three companion measures pass, and the bills die when the 34th Legislature ends in January 2027.

    akleg.gov · checked Oct 3, 2026

  45. Jan 15, 2027 · Maine: Watching: On January 1 every car’s excise rate steps down a year (a 2022 model goes to 4 mills in 2027), and new laws take effect, No change to the 5.5% rate, the mill rates or the fees was found; the 2026 session laws were not read one by one.

    maine.gov · checked Oct 3, 2026

  46. Jan 15, 2027 · Maine: Watching: Portland’s actual agent fee for a new registration, which its page does not list, Up to the $6 the law allows; the owner’s phone check is in SETUP-TODO.

    legislature.maine.gov · checked Oct 3, 2026

  47. Jan 15, 2027 · North Dakota: Watching: North Dakota’s 2027 legislative session (starts 2027-01-05) and NDDOT’s new calendar-year fee schedule, A bill to charge the excise by the age of the car (HB 1436 of 2025) failed; changes enacted in 2027 normally take effect 2027-08-01, and NDDOT publishes a new schedule each January.

    ndlegis.gov · checked Oct 3, 2026

  48. Jan 15, 2027 · Oklahoma: Watching: From 2027-01-01 dealers issue a 60-day temporary plate at the sale instead of the state mailing a metal plate, No fee for it was found, and the sources list no change to the registration fee.

    oscn.net · checked Oct 3, 2026

  49. Jan 1, 2027 · Alabama: Watching: ALDOR revalues cars each October 1 for the next calendar year’s ad valorem, and localities change their sales tax rates with 60 days’ notice in the monthly rate file, The January 2027 values and the monthly file should keep Huntsville at 4.00% in all.

    alison.legislature.state.al.us · checked Oct 3, 2026

  50. Jan 1, 2027 · Alaska: Watching: Anchorage may change its MVRT schedule, at most once every two years, with notice to DMV by January 1 of the year before, No change filed was found; the earliest a change could start is 2027-01-01.

    akleg.gov · checked Oct 3, 2026

  51. Jan 1, 2027 · Colorado: Watching: Lower registration fees from 2027 if a transportation-funding initiative passes (the passenger license fee’s $6 base to $3.72, the age fee $12 to $5.58), and a new EV fee section, Only if voters approve the initiative on 2026-11-03: from the governor’s declaration or January 1, 2027, whichever is later, to June 30, 2030.

    olls.info · checked Oct 3, 2026

  52. Jan 1, 2027 · Hawaii: Watching: Honolulu’s weight-tax rate and fees are set by ordinance and change on January 1, None pending in the Revised Ordinances current to June 2026 (Supplement 11); a rate enacted this year would start 2027-01-01.

    data.capitol.hawaii.gov · checked Oct 3, 2026

  53. Jan 1, 2027 · Indiana: Watching: Marion County’s surtax becomes a flat $100 a year instead of 10% of the excise (Case A: $100.00 instead of $40.60), for cars registered after December 31, 2026, From 2027-01-01, by City-County General Ordinance 44-2026.

    indy.gov · checked Oct 3, 2026

  54. Jan 1, 2027 · Kansas: Watching: Local sales tax rates change only on the first day of a quarter; the Department of Revenue posts the next quarter’s Pub. KS-1700 the month before, The next possible change is 2027-01-01.

    ksrevenue.gov · checked Oct 3, 2026

  55. Jan 1, 2027 · Kentucky: Watching: The title fee, the clerk’s registration fee and the additional registration fee move from the statutes to a Transportation Cabinet regulation, From January 1, 2027, at amounts the Cabinet hasn’t published; until then the statutes’ $9, $6 and $3.

    apps.legislature.ky.gov · checked Oct 3, 2026

  56. Jan 1, 2027 · Louisiana: Watching: The 2027 maximum doc fee (at most $449), Calculated by February 1, 2027 and published by the Louisiana Motor Vehicle Commission; it applies to calendar 2027.

    legis.la.gov · checked Oct 3, 2026

  57. Jan 1, 2027 · Maryland: Watching: The zero-emission and plug-in hybrid surcharges are adjusted for inflation each year from August 1, 2026, MVA had not posted the adjusted amounts on 2026-10-12; its fee page still shows $125 and $100.

    regs.maryland.gov · checked Oct 3, 2026

  58. Jan 1, 2027 · Michigan: What is taxed: a new version takes effect.

    legislature.mi.gov · checked Oct 3, 2026

  59. Jan 1, 2027 · Michigan: Watching: A regional transit registration tax in Southeast Michigan, up to $1.20 for each $1,000 or part of the list price a year (about $38 on the test car), Only after a public vote at a November election; none is in force. SB 695, which changes the election wording, passed the Senate in March 2026.

    legislature.mi.gov · checked Oct 3, 2026

  60. Jan 1, 2027 · Nebraska: Watching: Local sales tax rates change only on the first day of a quarter; the Department of Revenue posts the next quarter’s rate file the month before, The next possible change is 2027-01-01.

    nebraskalegislature.gov · checked Oct 3, 2026

  61. Jan 1, 2027 · New Hampshire: Watching: The electric vehicle registration fee becomes weight-based on 2027-01-01: battery electric $0 to $150 and plug-in hybrid $50, in place of $100 and $50, RSA 261:141-c as amended takes effect.

    gc.nh.gov · checked Oct 3, 2026

  62. Jan 1, 2027 · New Mexico: Fees: a new version takes effect.

    nmonesource.com · checked Oct 3, 2026

  63. Jan 1, 2027 · New York: Watching: A $25-a-year supplemental registration fee for counties outside the MCTD (Assembly bill A10431); it would not change New York City deals, if the bill passes; it has been in the Assembly Transportation Committee since 2026-03-06.

    nysenate.gov · checked Oct 3, 2026

  64. Jan 1, 2027 · Ohio: Doc fee rule: a new version takes effect.

    codes.ohio.gov · checked Oct 2, 2026

  65. Jan 1, 2027 · Rhode Island: Watching: Changes from the 2026 legislative session (the FY2027 budget) to vehicle fees or the tax, The online statutes showed amendments only through P.L. 2025 on 2026-10-03; no scheduled change was found.

    webserver.rilegislature.gov · checked Oct 3, 2026

  66. Jan 1, 2027 · South Carolina: Watching: Charleston County’s millage and local option sales tax credits for the 2026 tax year, used for cars licensed in 2027, On the County Auditor’s 2026 millage card, after the county sets the millage.

    scstatehouse.gov · checked Oct 3, 2026

  67. Jan 1, 2027 · Tennessee: Fees billed after you buy: a new version takes effect.

    tn.gov · checked Oct 2, 2026

  68. Jan 1, 2027 · Vermont: Fees: a new version takes effect.

    legislature.vermont.gov · checked Oct 3, 2026

  69. Jan 1, 2027 · Wisconsin: Watching: County and city tax rates change only on the first day of a quarter; the Streamlined Sales Tax Governing Board posts the next quarter’s Wisconsin rate file before it starts, The January 2027 file should show the same county rates and Milwaukee’s 2%.

    wisconsindot.gov · checked Oct 3, 2026

  70. Jan 1, 2027 · Wisconsin: Watching: A wheel tax is set and changed by local ordinance; WisDOT’s list shows the City of Milwaukee at $41 and Milwaukee County at $30, The list should still show both at those amounts.

    wisconsindot.gov · checked Oct 20, 2026

  71. Jan 1, 2027 · Wyoming: Watching: The Department of Revenue’s January 2027 rate chart, which should show Laramie and Crook counties at 6%, Published before 2027-01-01; the table already carries the announced rates from that day.

    drive.google.com · checked Oct 3, 2026

  72. Dec 31, 2026 · Virginia: Watching: Fairfax County sets its personal property tax rate and the state relief percentage for tax year 2027, in spring 2027, by the county.

    dmv.virginia.gov · checked Oct 2, 2026

  73. Dec 11, 2026 · Texas: Watching: The Finance Commission may take up the documentary-fee rule (7 TAC §84.205) again, at its meeting on 2026-12-11 (the 2026-10-16 agenda did not include §84.205).

    fc.texas.gov · checked Oct 2, 2026