Singapore Vehicle Road Tax Renewal

This file is the source-review record for this document version, per the manual-source-review-v1 practice. It documents the provenance of the published fields and flow and states the current verification claim honestly.

Current claim

• status: draft
• verification.method: manual-source-review-v1
• verification.lastVerifiedAt: 2026-07-04

The document was derived directly from the live OneMotoring guidance page, not from a downloadable form or an independently captured screen flow, because neither exists for this process. The live transactional "Renew Road Tax" digital service is Singpass-gated with no public test/ sandbox mode, so the full field-by-field comparison manual-source-review-v1 (Procedure step 2) requires against a live portal has not been completed. It therefore remains draft, not verified.

Sources examined

• Document (id, version): sg/lta/road-tax-renewal / 1.0.0
• Spec version: GovSchema 0.3.0
• Authority: Land Transport Authority (LTA), Singapore.
• Primary source URL: https://onemotoring.lta.gov.sg/content/onemotoring/home/owning/ongoing-car-costs/road-tax.html ("Road Tax") — fetched directly with curl, HTTP 200, a genuine server-rendered page (not a JS SPA shell). Read in full, including the "Understanding road tax", "Renewal prerequisites", "Road tax surcharge for vehicles over 10 years", "Where to renew your road tax" (the 4 payment channels: Online, AXS Services, GIRO, Road Tax Collection Centres), and "Late renewal fees" sections.
• Transactional service checked and found unusable as a direct source: https://onemotoring.lta.gov.sg/content/onemotoring/home/digitalservices/Renew_Road_Tax.html — fetched directly, HTTP 200, but the response body is only a client-side redirect stub ("LTA | Renew Road Tax / redirecting...") into a Singpass-authenticated session, consistent with the same Singpass-gating already documented for sg/lta/vehicle-ownership-transfer.
• Retrieved / reviewed: 2026-07-04.
• Reviewer: GovSchema Engineering (Standards Engineer — initial authoring source review).

What was directly observed vs. inferred

| Field(s) | Basis | |---|---| | vehicleRegistrationNumber | Directly observed, "How to check the road tax amount to pay — You can check how much road tax to pay by entering your Vehicle Registration Number". | | isWeekendOffPeakOrRevisedOffPeakCar, renewalPeriodMonths (12-month restriction) | Directly observed, verbatim: "For Weekend Cars/Off-Peak Cars/Revised Off-Peak Cars and Heavy Vehicles, there may also be additional prerequisites to meet. The road tax of Weekend Cars/Off-Peak Cars/Revised Off-Peak Cars can only be renewed on a 12-monthly basis." The 12-month restriction itself is recorded only in the field description (not a validation keyword), since GSP-0013's condition grammar gates required/visible, not a specific allowed value of another field. | | isHeavyVehicle | Directly observed, verbatim list of the four heavy-vehicle criteria under "For heavy vehicles". | | insuranceCoverageConfirmed | Directly observed, "Renewal prerequisites — Vehicle insurance coverage — Make sure your vehicle is covered by insurance for the entire period you are paying road tax. The vehicle insurance must cover third-party liability for deaths and bodily injury." | | vehicleInspectionDue, vehicleInspectionPassed | Directly observed, "Vehicle inspection (if one is due) — If your vehicle is due for periodic inspection, you will receive an inspection notice about 3 months before your road tax expires." and the "Pass the required vehicle inspection, if it is due" prerequisite bullet. | | noOutstandingFinesConfirmed | Directly observed, "Outstanding fines from LTA, HDB, URA and Traffic Police (TP) — If your vehicle has outstanding fines or warrants from LTA, HDB, URA and TP, it may prevent you from renewing your road tax." | | numberPlateSealInspected | Directly observed, "For Weekend Cars / Off Peak Cars / Revised Off Peak Cars — Inspect your vehicle number plate seals at an LTA-Authorised Inspection Centre." | | validVehicleParkingCertificate | Directly observed, "For heavy vehicles — Heavy vehicles must have a valid Vehicle Parking Certificate (VPC)." | | paymentMethod | Directly observed, "There are 4 different ways to renew your road tax: ... Online / AXS Services / GIRO / Road Tax Collection Centres", corroborated by the "Where to renew your road tax" section's numbered list. | | onlinePaymentInstrument | Directly observed, "1. Online at OneMotoring ... You will need: ... A valid credit or debit card (VISA or MasterCard only) or an Internet Banking account with DBS/POSB, OCBC/Plus!, Standard Chartered Bank or UOB (eNETS Debit)." | | axsPaymentInstrument | Directly observed, "2. AXS Services ... At AXS Stations, you can pay by: ... For AXS m-Station & e-Station, you can pay by: ..." (all six listed instruments transcribed verbatim into the enum). | | documents[].motorInsuranceCertificatePrintout, documents[].vehicleInspectionCertificatePrintout | Directly observed, "4. At Road Tax Collection Centres — Meet all renewal prerequisites in advance and bring along the original prerequisite documents. e.g. printout of your motor insurance certificate and vehicle inspection certificate." The inspection-certificate document is additionally gated on vehicleInspectionDue being true, since an inspection not due has no certificate to print. | | documents[].roadTaxPayment | Directly observed reference (the surcharge table under "Road tax surcharge for vehicles over 10 years" and the four late-renewal-fee tables under "Late renewal fees"); amount not encoded as a fixed field value, since LTA computes the base rate, surcharge, and any late fee automatically from the vehicle's engine capacity, age, and days past expiry — none of which the applicant enters directly in this transaction. |

Explicitly out of scope for v1.0.0

• Enrolling in a new GIRO arrangement. The source describes GIRO enrolment as a distinct "How to apply" flow via eGIRO (bank-login-gated, with a paper fallback "online form" for ineligible banks/foreign passport holders) that, once approved, causes future renewals to happen automatically without a manual transaction. paymentMethod: giro in this schema represents renewing via an already-existing arrangement (one of the source's own "4 ways to renew"), not the enrolment application itself.
• First-time vehicle registration/import and road-tax proration on sale/deregistration (transfer-following-the-vehicle and refund on deregistration) — both explicitly described on the same page as distinct events, not renewals.
• Computing the exact amount payable. The surcharge and late-fee tables are transcribed into documents[].roadTaxPayment.sourceRef for reference but not modelled as enterable fields, consistent with this registry's fee convention on schemas where a government authority computes the amount from data it already holds (cf. in/morth/vehicle-registration-renewal's renewalFee).

Test run with mock data

A mock renewal packet was assembled at conformance/sg/lta/road-tax-renewal/1.0.0/application-packet.json for an ordinary (non-Weekend/Off-Peak, non-heavy) private car renewing for 6 months online by credit/debit card — a fabricated vehicle registration number, not a real vehicle. Following the scripted-conformance-check technique introduced for in/morth/vehicle-registration-renewal, a small ad hoc script re-implementing the schema's own required/requiredWhen/ eligibleValues/validation.enum evaluation (GSP-0013 condition grammar all/any/not/leaf-compare) was run against the packet's collectedValues: 16 field/document entries evaluated, 0 violations. The packet exercises the online/no-inspection-due/ordinary-vehicle branch; the axs, giro, and collection_centre payment branches, the Weekend/Off-Peak-Car branch, the heavy-vehicle branch, and the inspection-due branch were reasoned through manually against the source text rather than exercised in a second packet. No value was submitted to any government system: the live OneMotoring "Renew Road Tax" service is a Singpass-gated transactional portal with no public test/sandbox mode, so — consistent with this registry's treatment of other credential-gated live services — this review did not attempt to exercise a live wizard end to end.

Scope and jurisdiction notes

This closes Singapore's DMV "Registration/Tag" renewal gap flagged as open in in/morth/vehicle-registration-renewal's VERIFICATION.md: per the GOV-960 audit lineage, India, New Zealand, and Singapore were the three jurisdictions with a published Drivers-Licence schema but no recurring Vehicle Registration/Tag renewal schema (as opposed to the one-time Title/ ownership-transfer schema, already published for all three). New Zealand remains open for a future cycle. CA/Ontario's ca/on/mto/vehicle-permit-renewal also remains open, a candidate twice blocked on a live-wizard eligibility lookup requiring a real, already-issued plate/permit pair.

Path to a verified claim (next step)

To advance to status: verified, a reviewer applies manual-source-review-v1 (Procedure step 2) field-by-field against the live OneMotoring "Renew Road Tax" service using a genuine Singpass login and an actual registered vehicle, confirms the exact AXS/online payment-instrument options still offered, resolves any discrepancy by shipping a new schema version (immutability — VERSIONING §3, practice Procedure step 5), and records the outcome here plus sets status: verified with a current verification.lastVerifiedAt/nextReviewBy.

Re-verification

Per the practice's Cadence, nextReviewBy is set to 2027-01-01 (6 months). Re-check the source on or before that date and on any source.url change.