Window cleaning postcards that book twice-a-year customers: what to put on the card, when to mail windows vs gutters, and what a $500 slot costs per home.
Most window cleaning marketing advice treats a new customer like a one-time sale. Hand out flyers, get a call, clean the glass, done. But that's not how a window business actually makes money. A good residential customer comes back every spring and every fall, adds the gutters, and tells the neighbors who did their windows. So when you look at window cleaning postcards, you're not paying for one job. You're paying to meet a customer you might keep for years, and that changes the whole math.
Here's the thing. Window cleaning has a built-in repeat. Glass gets dirty again. In most markets the normal residential rhythm is twice a year, spring and fall, and owners on window cleaning forums say the same thing: twice a year is where most homes land.
Now look at what one of those customers can be worth. Jobber's 2026 pricing guide, using Fixr data, puts the average for a house with 22 standard double-hung windows at $310, with a range of $190 to $460. It also says adding interior cleaning often raises the price 50 to 100%.
$310
Average 22-window house
~$620
Two full visits a year
$500
One slot on a shared 9x12
5,000
Homes that see your ad
If one customer books two full visits a year, that's more revenue than the slot cost, from one household. Then year two is the gravy. The fall visit again, the gutters, the screen repair, the neighbor who asks "who did your windows?"
Full transparency. Those are national averages, not your prices. A lot of spring and fall visits are exterior only and cost less, and revenue isn't profit. Nobody can promise you a number of calls, and results vary. So do your own math. Plug your real job price into the free postcard ad payback calculator and see exactly how many customers it takes to cover the ad.
You're not buying a phone call. You're buying a shot at a customer who calls you every spring.
The headline is the reason to call this week. A few window cleaning marketing ideas that fit a slot:
"Spring Window Cleaning: Free Screen Wash With Every Full House"
"Inside and Out, One Visit: Book by April 30"
"Fall Gutter Cleaning Before the Leaves Drop"
"Holiday Ready: Clean Windows Before the Guests Arrive"
Notice most of those give something away instead of knocking a percent off. Honestly, in my experience a free add-on beats a small discount almost every time. Screens are perfect for this. Cheap for you, and a homeowner who's never had their screens washed thinks it's a big deal.
Should you put a price on it? Window jobs swing a lot by window count and type, so be careful. A "from" price only works if you'll honor it on a normal house on that route. Otherwise skip the price and let the free add-on do the work.
This is where windows are different from pressure washing postcards. A dirty driveway next to a clean one sells itself in half a second. Clean glass is... invisible. That's literally the point of it, right?
So skip the generic photo of a window. Here's what reads better in a small slot:
The view. Shoot through a sparkling window at a green yard or a sunset. People buy the view, not the glass.
One pane done, one pane not. Pollen haze or hard water spots on one side, shot at an angle so the dirt catches the light.
You on the job. Your crew in uniform, ladder set up right, on a house that looks like the houses on the route.
Your own photos. Never stock. Homeowners can smell stock.
Gutters run on a different clock than windows. And that's good news, because it gives you two strong reasons to mail every year instead of one.
Gutter cleaning postcards should land before the leaves come down. That's when homeowners start worrying about it, and the window is short. A card on the counter in September can fill your October. Wait until the leaves are already in the gutters and you're fighting every other company that woke up the same week. In some markets the real gutter rush doesn't start until October (one owner on a window cleaning forum says that's when their season starts), so match your mail date to your own town.
There's a spring gutter job too (winter debris, seed pods), so a combo company can run a spring card that leads with windows and mentions gutters underneath.
This came up on one of our group calls. Travis was pitching a company that does gutter cleaning, Christmas lights, and windows, and trying to move the owner up to a double slot. The owner kept stalling because he couldn't decide which service to promote. Classic analysis paralysis.
My answer: lead with Christmas lights, because when you're up there, you're going to get the gutter job, too. And here's the exact line I'd use on the homeowner when they call about lights:
Hey man, before we do this Christmas light thing, you're going to want us to clean out those gutters so we don't catch your house on fire. And you don't want that, do you?
One headline on the card. The second service rides along on the phone. It is that simple.
Timing costs you nothing, and it's one of the biggest edges you've got. Mail before the season, so your card is already on the fridge the day the homeowner notices the streaks.
Mail window
What homeowners want
Offer that fits
February to March
Spring cleaning, winter grime off the glass
Full house windows plus free screen wash
April to May
Pollen season, summer company coming
Inside and out in one visit
August to September
Gutters before leaf drop
Gutter cleaning, windows as the add-on
October
The last gutter push before winter
Gutters, plus chimneys if you sweep them
November
A clean house for holiday guests and photos
Holiday-ready windows, or lights plus gutters
Look, in a cold market, don't mail a window card in January. Nobody's thinking about clean glass when it's 15 degrees out. In warm markets you can run longer. My month-by-month mailing calendar shows where windows and gutters fit next to every other industry.
Okay so let's talk money, window style. Forget cost per home for a second. What you care about is cost per booked job.
Option 1: mail your own card. Printing 5,000 9x12 cards through 9x12 Method Printing is $1,309 for Print Only, and EDDM Retail postage is $0.26 per piece as of July 12, 2026 (per the USPS EDDM page). Call it $2,609 before design and the post office paperwork, or $2,999 with our All Inclusive package where we print, prep, and mail it for you. At the $310 average job, a solo card needs around nine jobs just to cover itself.
Option 2: buy one slot on a shared card. $500 for the same 5,000 homes. At $310 a job, that's two jobs.
$2,609+
Solo 9x12, Print Only plus postage
~9
Jobs to cover it at $310
$500
One shared 9x12 slot
2
Jobs to cover it at $310
That's why I tell most one-truck window companies to start with a slot. Most operators also take only one window cleaner per card, so ask about that before you buy. And if even $500 feels like a stretch, a community card slot is $250 for 2,500 homes.
A solo card makes more sense once you're bigger, with a crew to keep busy and a full price menu to show. If that's you, my EDDM postcards page shows how we print and mail one for a business. One USPS detail if you go solo: a 9x12 is a "flat" in USPS terms, not a postcard, so leave the word "Postcard" off the printed piece.
Here's something every window cleaning flyer guide skips. EDDM goes to every address on a carrier route (or every residential address, if you pick residential only). You don't get to pick houses. You pick routes.
So the route IS the targeting. For windows and gutters, you want:
Single-family homes. A 300-unit apartment complex is 300 mailboxes and probably zero customers, because the property manager hires that work out.
Owners, not renters. Owners pay for exterior work. Renters usually don't.
Bigger, older homes. More windows means a bigger ticket, and older neighborhoods tend to have the big trees that fill gutters.
Year-round residents. A huge vacation home doesn't help if nobody's there in April.
The free EDDM route planner shows the carrier routes in any ZIP Code or city with the single-family share, owner-occupied share, median home value, and median year built. So you pick on purpose instead of guessing. If you're buying a slot on somebody else's card, ask which routes it's going to. A good operator will tell you straight.
This is the part that turns a $500 ad into a customer list. The postcard gets you the first visit. You get the second one.
Make the offer card-only ("mention the mailer for a free screen wash") and ask every new caller how they found you. Write it down.
Do a great job. Seriously. That's the whole retention plan.
Before you leave, book the next visit right there in the driveway. Spring customer? Put the fall clean on the calendar while they're looking at their sparkling windows.
If they won't commit, put them on your fall list and reach out in August with the gutter offer.
At the end of the season, count it up: how many card customers, how many rebooked, and what they'll be worth next year. Compare that to the $500.
If you want a scan count too, put a trackable QR code on the slot. Operators in our community use ScanLab for that. Here's my full guide to tracking direct mail results.
And give it more than one card. People usually need to see a name a few times before they pick up the phone. A spring card and a fall card from the same company starts to feel familiar fast.
If you run a postcard business, window and gutter companies belong high on your list. They put out yard signs and truck wraps constantly, they're owner-run so they decide fast, and a lot of them sell three services, which is a real reason to buy a double slot (I price those at $900). My pressure washing post covers the yard-sign prospecting play in detail.
Two window-specific things:
Sell both seasons at once. Spring windows and fall gutters are two natural cards. Offer them together.
Wear the work. James, one of our members in the UK, runs a gutter business on the side. When Facebook messages got him one reply, he walked into local businesses with 100 sample cards wearing his gutter company's logo shirt. Nearly everyone he talked to was interested.
Watch the overlap with pressure washers and some landscapers (here's how I sell landscaping postcards). Ask what each company offers before you sell both slots. And don't pitch a window cleaner in January in a snowy market. Wait for late winter, when they're planning spring.
Full transparency, I don't have a window cleaner's call log to share yet, and I won't make one up. The exact scripts and follow-ups we do have live inside the 9x12 Method community. You don't need it to get started. It just saves you time.
They can, because window cleaning has a built-in repeat. Most residential customers book about twice a year, so one customer can be worth more than a $500 shared slot. Results vary, nobody can guarantee calls, and the money really comes from rebooking the people the card brings in.
Lead with one seasonal offer, like a free screen wash with a full house in spring. Add one real photo (a clear view through clean glass beats a picture of a window), no more than three services, "Licensed and Insured," a QR code to booking, and a big phone number.
February to March for spring window cleaning, so the card lands before the season. August to September for gutters, before the leaves drop. October and November work for a last gutter push and holiday-ready offers. In cold markets, skip January.
Before leaf drop, usually August to September, so the card is on the counter when homeowners start worrying about it. Some markets peak later, in October, so match the date to your own town. A spring card works too for winter debris.
A solo 9x12 to 5,000 homes is about $2,609 with Print Only printing and EDDM Retail postage at $0.26 per piece (as of July 12, 2026), before design and prep, or $2,999 All Inclusive. A slot on a shared 9x12 is $500 for the same 5,000 homes. At a $310 average job, that's roughly nine jobs to cover a solo card and two to cover a slot.
Only a "from" price you'll honor on a normal house on that route, or none at all. Window jobs vary a lot by window count and type, so a free add-on like a screen wash usually works better as the hook. Give the real quote when they call.
That's window cleaning postcards. One seasonal offer, a photo of the view, a spring card for windows and a fall card for gutters, and the next visit booked before you leave the driveway. The card gets you the first job. You keep the customer.
As always, I'm rooting for you. Peace.
Ready to run your own card?
Get the course, scripts, tools, and weekly coaching inside the 9x12 Method community.
Mitchell Tebo
