The Hire Center is the middle building at the start of each world, accessible with the H hotkey. It is used to hire miners and buy upgrades for them. The upgrades are unlocked in the same building, after hiring the 10th miner. There are 10 miners and 10 tool upgrades for each of the worlds. There are 3 hire stations, with increasing costs for each upgrade as you progress through the game. It is important to get miners for your workforce.
Both hiring and upgrading cost money (and nothing else). This is affected by the Pay Cut relic, which decreases miner upgrade and hire costs by 5/8/10% (normal/warped/divine), up to a hard cap of 80%.
Income is directly tied to the number of miners and upgrades you have.
Every miner adds a 5% of the base production of each mineshaft (so, after buying all 10, you're at 50% production)
Then, every upgrade until 6th adds a 7.5% of production (up to 95%), with the 7th adding an extra 5% (up to 100%)
Then, the 8th, 9th and 10th upgrades add a 5% efficiency bonus to production
However, each relative increase has a decreasing component. The first miner produces 5% of base production. The second one allows to produce 10%, so it's a 100% increase. The third increases it to 15%, which is a 50% increase. And so on, for relative increases of 33,33%, 25%, 20%, 16,67%, 14,29%, 12,50%, 11,11% (last miner), 15% (first upgrade), 13.04%, 11.54%, 10.34%, 9.38%, 8.57%, 5.26%, 5.00%, 4.76%, and lastly 4.55%. This means you should de-prioritize the last upgrades, if the money can be better spent on the drillblueprints (see below for clarification on this).
The names of the upgrades are no longer shown in-game, they're a remnant of the old naming system (on the Classic version of Mr. Mine), and they've been kept merely because they are descriptive.
Name
Cost
Accumulated cost
Shovel
10 million
10 million
Golden Hammer
50 million
60 million
Jack Hammer
200 million
260 million
Drill
1 billion
1.26 billion
Excavator
6 billion
7.26 billion
Nuclear Excavator
40 billion
47.26 billion
Big Worker
350 billion
397.26 billion
Cyborg
1 trillion
1.4 trillion
Alien
10 trillion
11.4 trillion
Demon
100 trillion
111.4 trillion
upgrade
cost(in $)
E notation
1
10 million
1e7
2
50 million
5e7
3
200 million
2e8
4
1 billion
1e9
5
6 billion
6e9
6
40 billion
4e10
7
350 billion
3.5e11
8
1 trillion
1e12
9
10 trillion
1e13
10
100 trillion
1e14
Moon Miner hire Costs[]
miner
cost(in $)
E notation
1
0
0e0
2
10 trillion
1e13
3
25 trillion
1e13
4
100 trillion
1e14
5
400 trillion
4e14
6
1.8 quadrillion
1.8e15
7
8 quadrillion
8e15
8
30 quadrillion
3e16
9
110 quadrillion
1.1e17
10
300 quadrillion
3e17
Moon Upgrade Costs[]
Efficiency level
Cost
Accumulated cost
1
2 quintillion
2 quintillion
2
8 quintillion
10 quintillion
3
20 quintillion
30 quintillion
4
50 quintillion
80 quintillion
5
80 quintillion
160 quintillion
6
100 quintillion
260 quintillion
7
140 quintillion
400 quintillion
8
200 quintillion
600 quintillion
9
300 quintillion
900 quintillion
10
500 quintillion
1.4 sextillion
upgrade
cost(in $)
E notation
1
2 quintillion
2e18
2
8 quintillion
8e18
3
20 quintillion
2e19
4
50 quintillion
5e19
5
80 quintillion
8e19
6
100 quintillion
1e20
7
140 quintillion
1.4e20
8
200 quintillion
2e20
9
300 quintillion
3e20
10
500 quintillion
5e20
titan hire costs[]
miner
cost(in $)
E notation
1
free
0e0
2
100 quintillion
1e20
3
300 quintillion
3e20
4
1 sextillion
1e21
5
5 sextillion
5e21
6
25 sextillion
2.5e22
7
100 sextillion
1e23
8
300 sextillion
3e23
9
900 sextillion
9e23
10
3 septillion
3e24
titan upgrade cost[]
Efficiency level
Cost
Accumulated cost
1
20 septillion
20 septillion
2
80 septillion
100 septillion
3
320 septillion
420 septillion
4
1.28 octillion
1.8 octillion
5
5.12 octillion
6.92 octillion
6
20.48 octillion
27.4 octillion
7
81.92 octillion
109.32 octillion
8
327.68 octillion
437 octillion
9
1.31072 nonillion
1.746072 nonillion
10
5.24288 nonillion
6.9836 nonillion
Clarification on math for miner upgrades[]
The math for the efficiency production increase is shown here.
You work out the percent increase from the given formula (new value divided by old value) this will give something like 150% of the original value.
To show that as +x% we take -100% from the given number increase (by removing the original value from the increase).
miner/upgrade
total efficiency
% of old value
+% increase
0
0.00%
1
5.00%
#DIV/0!
#DIV/0!
2
10.00%
200.00%
100.00%
3
15.00%
150.00%
50.00%
4
20.00%
133.33%
33.33%
5
25.00%
125.00%
25.00%
6
30.00%
120.00%
20.00%
7
35.00%
116.67%
16.67%
8
40.00%
114.29%
14.29%
9
45.00%
112.50%
12.50%
10
50.00%
111.11%
11.11%
upgrade
total efficiency
increase
+% increase
1
57.50%
115.00%
15.00%
2
65.00%
113.04%
13.04%
3
72.50%
111.54%
11.54%
4
80.00%
110.34%
10.34%
5
87.50%
109.38%
9.38%
6
95.00%
108.57%
8.57%
7
100.00%
105.26%
5.26%
8
105.00%
105.00%
5.00%
9
110.00%
104.76%
4.76%
10
115.00%
104.55%
4.55%
Historical notes[]
Apparently, at some moment in the historical version of Mr. Mine, circa 2013, the prices for miners were: 0 (first one was free), 200, 1500, 3,000, 10,000, 30,000, 100,000, 500,000, 3,000,000, 10,000,000.
