Mulch Installation Cost Calculator

Multiply bed square footage by depth in inches and divide by 324 — a 500 sq ft bed at 3" needs about 5.0 yards with spillage and settling figured in. Quick coverage check: one yard covers 162 sq ft at 2", 108 sq ft at 3", or 81 sq ft at 4".

On this calculator's reference job (500 sq ft, 3" hardwood, delivered and spread) the total works out to about $87 per yard — right in LawnStarter's published $77–$94 per yard installed average for 2026. Small jobs cost more per yard because the delivery fee and trip minimum spread over fewer yards.

For the reference job, bagged mulch runs about $476 versus $435 delivered in bulk — roughly $41 more, because ~13.5 two-cubic-foot bags make a yard and retail bags carry a premium. Rule of thumb from mulch suppliers: multiply a bag price by 13.5 to get its true per-yard cost. Bags only win below about 2 yards, or where a truck can't reach the beds.

Yes under stone or rubber, debatable under organic mulch: bark dust and decomposed mulch sit on top of fabric and turn it into a planter within a few seasons, and roots weld to it. Adding fabric to the reference job costs about $225 installed — landscapers charge roughly $0.25–$0.99 per sq ft depending on crew and fabric weight (Homewyse lists $0.48–$0.99 full-service). If you use fabric, pick a woven 3-oz geotextile and pin it every 3–4 ft.

The same 500 sq ft bed in decorative gravel at the usual 2" depth prices out around $733 versus $435 in hardwood — stone runs $100–$200+ per yard delivered and takes a crew longer to wheelbarrow and rake, which is why this model adds a 1.4× labor factor for it. Budget the two add-ons a stone bed really needs: the fabric toggle in this calculator (organic matter composting under stone without fabric turns the bed into a planter within a few seasons) and real edging, because stone migrates into turf without a hard boundary. After that it's a one-time cost — no annual refresh, just weed re-sprays and top-ups of thin spots every few years.

Organic mulch fades and thins in about 12 months — hardwood decomposes fastest (it feeds the soil as it goes), cedar is slower and holds color longer, and dyed mulch fades to gray in a season. Most homeowners top-dress 1" each spring: about 75 in material for the reference bed if you spread it yourself, or roughly a third of the full installed job if a crew does it. Two cautions while you're out there: keep mulch a few inches clear of tree trunks and shrub stems (the "mulch volcano" holds moisture against bark and invites rot and pests), and never total more than 4" of depth, which suffocates roots. Stone and rubber don't decompose — that's their whole pitch.

Materials for the reference job run about $225 at the bulk yard, versus $435 installed — so you keep roughly $210. The catch is labor: two people wheelbarrow and spread about a yard an hour, so 5 yards is a solid day, and the pickup option means several truck trips unless the yard delivers to your driveway for $60 or so.