It's the first question every landowner asks: "What's tile run me an acre?" Fair question. But field tile isn't a product off a shelf with a sticker on it — it's a custom earthmoving job, and the per-acre number swings hard depending on what your ground needs. Two 40-acre fields a mile apart can land at very different numbers, and both contractors are being honest.
This post walks through the real factors that move the price — outlet, spacing, soil, depth, pipe sizing, acreage, and whether you're doing surface or subsurface work — so when you get a quote, you'll understand exactly what you're paying for. We'll also point you to the public, sourced industry ranges so you've got a ballpark to anchor on before anybody walks your field.
First, A Word On Per-Acre Numbers
You'll see figures online. They're useful as a sanity check, but only if you understand they're public industry ranges, not a quote for your field. Several published sources put a typical pattern-tiled field in the neighborhood of $1,000–$1,500 per acre for a full subsurface system — that figure shows up regularly in farm-press coverage and extension discussion of tiling costs. The University of Illinois farmdoc team (Dept. of Agricultural & Consumer Economics) has likewise published return-on-investment work that uses installed costs in that general range when it models whether tiling pays back through higher, more consistent yields.
How to read those numbers: the $1,000–$1,500/acre figure is a public industry range reported by farm media and used in University of Illinois farmdoc ROI analysis — not a Brohez price, and not a promise about your field. Your project varies. Wide-spaced laterals on flat, easy ground with a ready outlet can sit at the low end or below; tight spacing, deep mains, a long outlet run, or tough soil can sit well above it.
We don't post a Brohez price anywhere, because a number on a website would be a guess, and a wrong guess helps nobody. The only real figure for your ground comes after we walk it — and that walk is free.
The Seven Things That Move The Number
Read these and you'll understand your own quote better than most folks who sign one.
1. The outlet — distance and whether one even exists.
This is the big one, and the one people forget. Tile has to drain somewhere — a creek, a ditch, a county main, or a daylight outlet you have rights to use. If a good outlet sits at the edge of the field, you're in great shape. If the nearest legal outlet is a quarter mile away, every foot of main between your field and that outlet is pipe in the ground that moves the per-acre number up. No outlet at all means the whole project waits until one is sorted out. We look at this first, before anything else.
2. Tile spacing and pattern.
Pattern tiling — parallel laterals across the whole field — moves more water and costs more per acre than a few targeted random lines through wet pockets. How tight you space the laterals depends on your soil and how dry you want the field. Closer spacing means more pipe per acre and a higher number; wider spacing means fewer feet of tile but slower, less complete drainage. The Illinois Drainage Guide lays out recommended spacing by soil type — it's the reference engineers use, and it's why two fields with different soils get different designs.
3. Soil type.
Soil decides how fast water moves to the tile, which decides how tight you space it. Heavy clay drains slowly and wants closer laterals to dewater in a reasonable time; lighter, more permeable ground drains faster and tolerates wider spacing. Soil also affects the dig itself — rock, sand seams, or unstable trench walls slow the machine down. Same acreage, different dirt, different number.
4. Depth.
Field tile typically runs 3–4 feet deep, deeper than yard drainage, and every foot of depth is more dirt to move and slower trenching. Depth also interacts with spacing — deeper tile can pull water from a wider band, which sometimes lets you space laterals farther apart. It's a balance the design has to strike for your field, and it shows up in the cost.
5. Main vs. lateral sizing.
A tile system is a tree: small laterals feed bigger mains that carry the combined flow to the outlet. Laterals are usually 4-inch; mains step up — 6, 8, 10 inches or more — as they collect more water. Bigger pipe costs more per foot and the mains have to be sized right, because an undersized main bottlenecks the whole system no matter how good the laterals are. The more acres draining to a main, the larger and more expensive that main run gets.
6. Acreage.
More acres means more total pipe, but the per-acre number doesn't move in a straight line. Bigger jobs spread fixed costs — mobilization, the outlet structure, getting equipment on site — across more acres, which can pull the per-acre figure down. A small isolated wet pocket can actually cost more per acre than a whole field because the setup is the same but there are fewer acres to carry it.
7. Surface vs. subsurface work.
Subsurface tile is the buried-pipe system everyone pictures. But some fields need surface work too — grassed waterways, surface inlets, or grading to get ponded water moving toward the tile in the first place. Tile pulls water down through the soil; it doesn't fix water sitting on top of tight ground that can't soak in fast enough. A field that needs both costs more than one that needs tile alone, and the right mix is part of what we read when we walk it.
So What Should You Expect To Pay?
Honestly: it depends, and now you know why. Anchor on the public industry range — that $1,000–$1,500 per acre figure reported in the farm press and used in University of Illinois farmdoc ROI work — as a ballpark to start the conversation, but understand your field can land below it or above it depending on the seven factors above. The single biggest swing is usually the outlet; after that, spacing and soil.
What we won't do is throw a number at you over the phone or post a price on this website. We come walk the field, read the soil and the slope, find your outlet, sketch the spacing your ground actually needs, and hand you a real figure for your project. That walk is free, with no obligation.
Does Tile Pay For Itself?
For a lot of central-Illinois ground, the case for tiling isn't really about the install cost — it's about what wet feet cost you every year in lost stand, delayed planting, and rutted-up fields. University of Illinois farmdoc has published ROI work weighing installed tile cost against the yield bump and the extra workable days you get on drained ground. It's worth reading their numbers for yourself before you decide — they're ag economists, not contractors, so you're getting a straight picture rather than a sales pitch.
What To Do Before You Call
- Find your outlet. A creek, a road ditch, a county tile main, a low spot you have rights to drain into. This is the first thing we'll ask about, and it's the biggest cost driver.
- Mark the wet spots. Walk the field after a rain and note where water sits and how long. Photos and a rough map help us read what the field needs.
- Know your acres. A rough acreage for the area you want drained gets us to a ballpark faster.
- Note any existing tile. Old clay or HDPE lines you know about — working or failed — change the plan. (If you've got tile that quit, that's a different job — see drainage tile repair.)
Bottom Line
Field tile cost isn't a mystery, but it isn't a sticker price either. The public industry range — roughly $1,000–$1,500 per acre, per farm-press reporting and University of Illinois farmdoc ROI analysis — gives you a ballpark to anchor on, but your real number depends on your outlet, your spacing, your soil, your depth, your pipe sizing, your acreage, and whether you need surface work too. Anybody who quotes your field sight-unseen is guessing.
We do field tile installation and tile work across the 60-mile radius from Mattoon — Charleston, Effingham, Champaign, Decatur, Sullivan, Tuscola, Shelbyville, Pana, and everywhere in between. Call or text (217) 809-0779 and we'll walk your field and give you a straight number for what it actually takes.