New Mexico charges a 2% penalty per month on unpaid gross receipts tax. The penalty caps at 20% of the tax due. If you owe $1,000 and file three months late, you’re looking at $60 in penalties before you’ve paid a dollar of the actual tax.

Interest accrues separately from the penalty. The rate is set quarterly by the Taxation and Revenue Department and typically runs between 4% and 7% annually. Interest compounds on your unpaid balance, so each day you wait adds a little more to what you owe.

The common mistake is waiting to file until you can pay everything. That backfires. Penalties are calculated on unpaid tax, so filing the return and paying what you can reduces the base amount that penalties grow from. File now and work out a payment arrangement for the rest if you need to.

If you ignore unpaid GRT long enough, the state has options. They can file liens against your business, intercept any state tax refunds you’re owed, or levy your bank accounts directly. These collection actions create problems beyond the original balance and can affect your ability to get business financing or renew certain licenses.

Getting caught up is usually more straightforward than people expect. File the missing returns, pay as much as you can, and contact the department about a payment plan for the remainder. They’re generally willing to work with businesses that are actively trying to become compliant. Working with virtual bookkeepers in New Mexico can help you prepare accurate returns for the months you missed so you’re not creating new problems while fixing old ones.

The easiest path forward is not getting behind in the first place. GRT return filing is one of those tasks that’s simple to hand off. The 25th of each month deadline is easy to miss when you’re running a business, but it’s a straightforward recurring task for someone whose job is to track it. The monthly cost of having your returns handled is almost always less than what a single late penalty would cost.