If a property owner does not have a tax bill, use the tax payment site here to find out the exact amount owed. Take a look at our Back Taxes Owed page.You may qualify for a selfservice, online payment plan (including an installment agreement) that allows you to pay off an outstanding balance over time. Convenient online payment services via credit card, debit card or electronic check payments. The Treasurer's Office has several payment options. Clark County Treasurer Phone: (702) 455-4323 500 S Grand Central Pwky Box 551220 Las Vegas, NV 89155-1220 Office Hours Mon: am - 5: All tax bills are mailed 20 to 25 days before the due date.