What will filing late cost?
The Department publishes the penalty schedule, the quarterly interest rate and the vendor collection credit, and computes none of them together. This does the arithmetic from the rules set out below.
New York quarters end in February, May, August and November, and the return is due 20 days later, so the date above is prefilled with the most recent quarterly deadline. Change it if you file monthly or annually — the due dates calculator will tell you which one applies to you.
Enter the tax due to see what being late adds to it.
What the three numbers are
Being late costs three separate things, and they behave differently. The Department publishes all three and computes none of them together, which is why this page exists.
| Charge | How it works | Source |
|---|---|---|
| Penalty | 10% of the tax for the first month, plus 1% for each additional month or part of a month, capped at 30%. A late return carries a $50 floor. | s. 1145(a)(1)(i) |
| Interest | 14.5% a year, compounded daily, reset every quarter. This is the part that rewards paying sooner. | published rate tables |
| Vendor collection credit | 5% of the tax reported, capped at $200 a return, which you keep only by filing on time and paying in full. Being late forfeits it. | Tax Bulletin ST-925 |
The penalty grows, and that is the opposite of Florida
If you have read that a state sales tax late penalty is a flat 10%, that is Florida, not New York. Here a return one month late costs 10% and a return twelve months late costs 21%, climbing a point a month until it stops at 30%.
On $10,000 of tax that is $1,000 against $2,100 — and the clock runs on calendar months from the due date, not 30-day blocks, so a single day past the monthly anniversary adds a full percentage point. The calculator above shows the month count it used, because that is where the surprise is.
Filing on time and paying late is a materially cheaper mistake
This is the most useful thing on the page and almost nobody computes it. The percentage is the same either way. What differs is the floor:
- A late return carries a $50 minimum — even with no tax due at all, even one day late.
- A timely return whose money arrives late carries the percentage and, per the Department's own bulletin, no stated minimum.
So on a quarter with $300 of tax, filing and paying a week late costs $50. Filing on the day and paying a week late costs $30. If you cannot pay, the return is still worth getting in. Tick the box on the calculator to see your own two figures.
Past 60 days the floor changes shape
A return more than 60 days late carries at least the lesser of $100 and the whole tax due. On a large liability that is irrelevant — the percentage is far bigger. On a small one it is the whole answer: $120 of tax, three months late, is a $100 penalty where the percentage alone would be $13.20.
This is the single cliff in the New York schedule, and it falls between day 60 and day 61. If you are near it, the days matter more than the months.
Interest compounds, and sales tax is charged more than income tax
New York resets its interest rates every quarter and publishes a different rate for each tax. For the final quarter of 2026 the late-payment rate is 14.5% on sales tax against 9.5% on personal income tax — so the same lateness is charged half as much again here.
It is compounded daily, not simple, which the calculator models. It counts interest on the tax alone; the Department may also charge interest on penalty, so the figure is an understatement rather than an overstatement. When your dates run past the last quarter the Department has published, the page says so on screen instead of extrapolating a rate nobody has set.
Monthly filers never had the credit to lose
The vendor collection credit is for quarterly and annual filers. Part-quarterly (monthly) filers on Form ST-809 and PrompTax enrollees do not get it at all, so for them being late costs the penalty and the interest and nothing else. Set the frequency on the calculator and the third line disappears.
If you have not filed yet, check the deadline first
New York's sales tax year runs March to February, so the quarters end in February, May, August and November and the return is due 20 days later. That is not the calendar quarter most people assume.
Work out your next deadline from your filing frequency, or see the Department's own due-date tables.
Can a penalty be waived?
Sometimes. The statute lets the Commissioner remit a penalty where the failure was due to reasonable cause and not willful neglect, and the regulations set out what that means. That is a decision about your facts, made by the Department, and nothing on this page predicts it. If an assessment has already landed, take it to someone who can read it against your records — we are not tax professionals and this is not advice.