Plan equipment budgets with clear rental totals and options for any crew. Adjust duration, quantity, and surcharges to match scope before you book today.
| Scenario | Basis | Rate | Duration | Qty | Delivery | Surcharges | Tax | Total (Approx.) |
|---|---|---|---|---|---|---|---|---|
| Utility trenching | Daily | 175 | 3 days | 1 | 65 | 10% | 8.25% | ~630 |
| Fence posts | Hourly | 35 | 6 hours | 2 | 0 | 5% | 0% | ~441 |
| Foundation piers | Weekly | 620 | 1 week | 1 | 95 | 12% | 9% | ~864 |
These figures are illustrative and will vary by region, auger diameter, and ground conditions.
Billable Units = max(Planned Duration, Minimum Units)
Base Cost = Quantity × Rate per Unit × Billable Units
Insurance Cost = Insurance per Unit × Billable Units × Quantity
Pre‑Percent Subtotal = Base Cost + Operator + Insurance + Delivery + Cleaning + Environmental
Percent Surcharges = Pre‑Percent Subtotal × (Fuel% + Waiver%)
Late Penalty = Quantity × Late Units × Late Fee per Unit
Discount = Percent or Fixed amount applied to running subtotal
Tax = (Subtotal − Discount) × Tax%
Total = (Subtotal − Discount) + Tax
Auger attachments are commonly rented for post holes, utility trench crossings, helical piers, and light foundation work. Rental planning keeps drilling operations predictable by aligning equipment availability, crew time, and site access. A clear estimate also reduces change orders caused by unpriced add-ons such as delivery, insurance, damage waivers, and late-return charges.
Vendors price augers by hour, day, week, or month. The rate basis is not just a label; it changes how minimum billing and late penalties apply. For example, a “daily” rental may still bill a full day even if the attachment is used for only a few hours. This calculator converts planned duration into billable units using the maximum of planned time and minimum units.
Larger diameters and specialty bits often carry higher insurance and waiver percentages because torque loads and wear increase. Ground conditions add risk: cobbles and hardpan can slow progress and push usage into additional billable units. Use the notes field to record diameter, tooth type, and soil description so your estimate aligns with the actual scope.
Some rentals include an operator; others assume your crew provides labor. When operator time is billed separately, the cost can rival the attachment rate on short jobs. If you know scheduled operator hours, enter them directly. Otherwise, leaving billed hours at zero mirrors the billable rental duration for a reasonable baseline.
Delivery and pickup fees are common when the attachment ships with a skid steer or when yard pickup is impractical. Cleaning fees may apply if the auger returns with heavy spoil. Environmental fees can cover disposal or compliance costs. These line items are added before percentage surcharges so you can see their true impact on totals.
Fuel surcharges and damage waivers are typically percentage-based. This calculator applies them to the subtotal of base cost and fixed add-ons, then applies any discount and finally tax. This order reflects typical rental invoices and makes it easier to compare quotes from different suppliers. Always confirm whether tax applies to delivery in your jurisdiction.
Example: Daily basis, rate 175, planned 3 days, minimum 1, quantity 1, insurance 8 per day, delivery 65, fuel 3%, waiver 7%, tax 8.25%, deposit 20%. The calculator produces a transparent breakdown and a total close to the example table above, helping you validate your inputs quickly.
Once results appear, download the CSV for internal budgeting or the PDF for a site file. Use deposit and balance fields to plan cash flow. If late units are likely due to permitting or access delays, model that penalty upfront. Strong rental estimating improves schedule discipline and keeps drilling productivity high.
Use the vendor’s stated minimum, such as one day or four hours. The calculator bills the greater of planned duration and this minimum so short jobs still reflect real invoicing rules.
If the vendor charges a separate operator, enter scheduled hours from your work plan. If you are unsure, leave it at zero so the calculator mirrors billable rental duration as a baseline.
This calculator applies percentage surcharges first, then discount, then tax. Many rental invoices follow this sequence, but you should match the vendor’s quote if they apply discounts earlier.
A late unit is an extra hour, day, week, or month beyond the billable duration, depending on the selected rate basis. Enter both late units and the vendor’s late fee per unit.
Yes. Increase the quantity field to represent multiple attachments billed under the same terms. Delivery may still be a single flat fee; adjust delivery and pickup to match your agreement.
These are common invoice items when attachments return with heavy spoil or require special handling. Adding them improves estimate accuracy and reduces surprises when reconciling rental charges.
Deposits affect cash flow at dispatch, while the balance is typically due after return and inspection. Use these values to plan payment timing and to align rental costs with job billing milestones.
Accurate estimates help crews drill safely and profitably always.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.