Quarterly Estimated Taxes for Landscapers: Paying on Seasonal Income

It's January 15. The mowers have been in the shop since Thanksgiving, and the IRS wants a payment on money you earned in September.

That's quarterly estimated taxes for a landscaper. Nobody withholds tax from what your clients pay you, so the IRS expects you to send it in as the year goes. The catch is that its schedule is built for income that shows up evenly, and yours shows up in a rush from April to October and then stops.

Here's how the system works, the one rule that keeps you clear of the penalty, and how to line the payments up with a seasonal year.

Do landscapers have to pay quarterly estimated taxes?

Most do. The IRS says sole proprietors, partners and S corporation shareholders generally have to make estimated payments if they expect to owe $1,000 or more when they file.

If you run your own crew and turn a profit, you will almost always clear that. Self-employment tax alone is 15.3% on 92.35% of your net earnings, which works out to roughly 14.1% of your profit before a dollar of income tax. On $60,000 of profit:

• $60,000 × 92.35% = $55,410 subject to self-employment tax
• $55,410 × 15.3% = $8,478 in self-employment tax

That's about $8,500 owed before income tax is even counted. If none of it gets paid during the year, it all lands in April, along with a penalty.

When are the 2026 estimated tax payments due?

The 2026 Form 1040-ES and Publication 505 set four dates. The periods are not equal quarters, which surprises people:

Payment	Covers income earned	Due
1st	Jan 1 to Mar 31	April 15, 2026
2nd	Apr 1 to May 31	June 15, 2026
3rd	Jun 1 to Aug 31	Sept. 15, 2026
4th	Sep 1 to Dec 31	Jan. 15, 2027

Two details worth knowing. You can skip the January 15 payment entirely if you file your 2026 return by February 1, 2027 and pay the full balance with it. And you can make more than four payments if you want to, which matters for a business like yours.

Why is the default schedule wrong for a seasonal business?

The standard approach is four equal payments. Here's what that looks like against a real landscaping year. Say you net $60,000, earned like this:

Period	Profit earned	Share of the year
Jan to Mar	$3,000	5%
Apr to May	$15,000	25%
Jun to Aug	$24,000	40%
Sep to Dec	$18,000	30%

Equal payments ask for 25% of the year's tax by April 15. By then you've earned 5% of the year's profit. By June 15 they want half, and you've earned 30%. You're paying ahead of the money at exactly the point in the year when cash is tightest: spring equipment, the first payroll, a trailer of mulch.

The tax isn't the problem. The timing is. Fix the timing and the tax stops feeling like an ambush.

You have two ways to fix it.

What is the safe harbor, and how does it stop the penalty?

This is the simple route, and for most small crews it's the right one.

The IRS won't charge an underpayment penalty if your payments during the year add up to the smaller of 90% of this year's tax or 100% of the tax on last year's return. Last year's return has to cover all 12 months. If your adjusted gross income last year was over $150,000 ($75,000 married filing separately), the 100% becomes 110%.

The useful part is that last year's number is already known. If your 2025 return showed $9,000 of total tax, four payments of $2,250 keep you clear of the penalty, even if 2026 turns out to be your best year yet. You pay whatever else you owe with your return in April, with no penalty on it.

It doesn't fix the spring squeeze, since you're still paying equal amounts. What it gives you is a fixed number you can plan around, instead of guessing what a season you haven't worked yet will earn.

Can you pay less in the slow months?

Yes. The IRS has a method built for exactly this. The 1040-ES instructions name the case directly: income received unevenly, "because you operate your business on a seasonal basis."

It's called the annualized income installment method. Instead of assuming you earn evenly, each payment is figured on what you actually earned up to that point. A January to March with almost no profit means a small April payment, and the bigger payments fall in September and January, after the money came in.

The trade-off is paperwork. You figure it on Form 2210, Schedule AI, file it with your return, and chapter 2 of Publication 505 walks through the worksheet. It needs your profit broken out by period, which is the part most operators can't produce in a hurry. If your spring is truly dead and your fall is strong, it's worth asking your accountant to run it.

How do you make sure the money is there when it's due?

Every method above fails the same way: the payment comes due and the money got spent on a transmission in August.

The fix is boring and it works:

1. Move a share of every payment the day it lands. A separate savings account, untouched. Self-employment tax alone is about 14.1% of profit, and income tax comes on top, so your number is higher than that. Ask your accountant for your rate once and stop guessing.
2. Pay after your strongest months. Since extra payments are allowed, sending one in July after a big June means the September date holds no surprises.
3. Pay directly from your bank. IRS Direct Pay takes it from checking or savings at no cost. Cards work too, but the processors charge a fee.
4. Check your state. If your state taxes income, look up whether it has its own estimated payment schedule before April.

All of it depends on knowing what you actually made each month, and that's where Terrascape helps. Client payments come in through one place, and the financials page shows each month's money in, costs, and what you kept, so the number your accountant asks for is already there. Expenses go on the books the day they happen: send Zentra a photo of the fuel receipt, or just type "log $60 of fuel," and it's recorded. Job costing shows which work is paying for those tax payments. And if you'd rather your clients pay you through the winter too, recurring billing spreads the year out, which makes January a lot less painful.

The short version

Before the next payment comes due:

• Find last year's total tax on your 2025 return and divide by four. That's your safe harbor payment.
• Mark the date: Jan. 15, 2027 is the next one, then April 15, June 15 and Sept. 15 for 2027.
• If spring is your dead zone, ask your accountant about the annualized method on Form 2210.
• Start setting money aside every time a client pays, not once a quarter.

You didn't start a landscaping business to think about tax periods. Get the timing right once and it's four dates a year, already funded, and nothing waiting for you in April. If you want the month-by-month numbers in one place while you set it up, Terrascape starts with 7 days free.