Estimate a quarter before you file it
Put in the quarter's miles and gallons and it runs the same arithmetic the product does — fleet MPG, taxable gallons per jurisdiction, net gallons, surcharges, total.
Everything happens in this browser. No miles, gallons or receipts leave your phone, nothing is uploaded and nothing is stored.
This is an estimate, not a return, and not tax advice. It uses 3Q2026 rates for whichever fuel you pick and applies no interest. It asks for a purchase date only where a jurisdiction's rate moved mid-quarter, takes exempt and trip-permit miles if you have them, and can show the R1220 late-filing penalty on request. Have a qualified tax preparer review any return before you file it.
Estimated for the quarter
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| JurisdictionCode | Taxable gal | Paid gal | Net gal | Rate | Tax |
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A surcharge row is computed on taxable gallons, not net gallons — it never nets against fuel you bought and can never come back as a credit.
An estimate, not a return. It applies no interest, and has not been checked against a real filed return. Where you did not give taxable miles separately, it treated every mile in that jurisdiction as taxable. See exactly what it computed, and have a qualified preparer review anything you file.
Doing this once is fine. Doing it every quarter is the problem
CabPurser is being built so the miles and gallons are already in place when the deadline arrives, instead of being retyped from a shoebox.
Goes to a person, not a drip sequence.